Date   

Re: large alignment error with polemaster & mach2

Jim Hawn
 

Hi Robert,

I think that is right.  As a rule of thumb, I too find that one arc minute or less is adequate for producing decent subs using PHD2 all other things equal.


locked Re: [ap-ug] To mask or not to mask, that is the question

Richard Crisp
 

If I go in public I wear mask and gloves

“Corrected” by my iPhone

On Aug 1, 2020, at 5:01 PM, chris1011@aol.com wrote:


Re: Moving to a new imaging laptop #APCC

Dean Jacobsen
 

Yes, we will see how well it works.  ;-)  I want to carry over as many of the settings from the old machine to the new machine as possible.  Then I can go in and reconfigure machine specific settings - like the COM port setting - manually on the new machine.  Now I just need the new machine.
--
Dean Jacobsen
http://astrophoto.net/wp/
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 


Re: To mask or not to mask, that is the question

DFisch
 

And here I thought Rowland was going to talk about putting a mask on his 10 inch Mak to make it a 4 “ in order to be fair to all the other telescope makers

On Sat, Aug 1, 2020 at 21:57 Robert Sinitiere <bobstar9@...> wrote:
Funny but good video.....So, wear your Masks, for astronauts and non astronuts!
Be Safe everyone at Astro-Physics, and everyone else out there.  I was a unit based pharmacist and infusion pharmacist for 43 years.  I’m 70 now, and I’m sure masks played some part in my survival, for N95 PPE’s on the units, and self preservation PPE’s
compounding some fairly toxic chemotherapy agents.  Let’s all survive to see 2021!!
CLEAR SKIES!!



On Aug 1, 2020, at 4:38 PM, uncarollo2 <chris1011@...> via groups.io <chris1011=aol.com@groups.io> wrote:


Hi Astronuts,

This is completely off-topic. My daughter sent me this funny video which attempts to answer today's most pressing question. What are masks for and do they really work? The video is funny and completely non-political. It's in the style of the old Myth Buster's TV programs where they were always blowing things up or burning them down. So, if you have a few minutes to spare, sit down and watch this:

Love ya all and stay healthy,
Rolando Kissing heart

--
TJF MOBILE


locked Re: [ap-ug] To mask or not to mask, that is the question

thefamily90 Phillips
 

As a physician, I have not missed a day at work since this virus stuff began. I have been there with almost nothing to do for days on end but I still have gone in. Things are getting back to normal in terms of patient volume and biopsies, etc. I just hope we move forward and not backward.


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of thefamily90 Phillips <thefamily90@...>
Sent: Sunday, August 2, 2020 9:08:43 AM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>; rdcrisp@... <rdcrisp@...>; main@ap-ug.groups.io <main@ap-ug.groups.io>; robert-wynne@... <robert-wynne@...>
Subject: Re: [ap-gto] [ap-ug] To mask or not to mask, that is the question
 
I wear a mask when out in public or when dealing with patients in the Dermatopathology office down the hall. As a dermatopathologist I read skin margins for excision of cancers while the patient is in the office. I have to have contact with the physician and often go into the dermatology office during the procedure. I wear a mask then. I don’t really know whether it is doing anyone any good or not, but I know if I don’t wear one I will make others nervous and there is no need to do that.


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of uncarollo2 <chris1011@...> via groups.io <chris1011@...>
Sent: Saturday, August 1, 2020 8:01:27 PM
To: rdcrisp@... <rdcrisp@...>; main@ap-ug.groups.io <main@ap-ug.groups.io>; robert-wynne@... <robert-wynne@...>; main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] [ap-ug] To mask or not to mask, that is the question
 
It takes a while to get used to it. Just like it took a year to begin wearing seatbelts back in 1960. But now it's automatic. I don't even think about seatbelts, they just seem to attach themselves.

Rolando Blush


-----Original Message-----
From: Richard Crisp <rdcrisp@...>
To: main@ap-ug.groups.io; robert-wynne@...; main@ap-gto.groups.io
Sent: Sat, Aug 1, 2020 6:11 pm
Subject: Re: [ap-ug] To mask or not to mask, that is the question

I figure there are three scenarios of interest re: masks
 
  1. Preventing you from inhaling viruses
  2. Limiting the range of your phlegm
  3. Keeping you from touching your nose and mouth etc
 
I figure 1 is about like expecting chicken wire to keep mosquitoes out
#2 is reasonable and a kind thing to do for your fellow man (this is S.O.P. in Japan for decades btw) and #3 is a dead on BULLSEYE for me
 
It’s a constant battle for me to try to remember to keep my hands away from my face/eyes.
 
Not sure about you, but it’s hard for me to break habits that are going on their 7th decade!
 
 
 
From: main@ap-ug.groups.io <main@ap-ug.groups.io> On Behalf Of Roland Christen via groups.io
Sent: Saturday, August 1, 2020 3:31 PM
To: robert-wynne@...; main@ap-ug.groups.io; chris1011@...; main@ap-gto.groups.io
Subject: Re: [ap-ug] To mask or not to mask, that is the question
 
Yes, maybe a fine point.
I wear one not for my own protection because breathing in doesn't prevent my getting a lung full of critters. My mask is for the protection of other people so that my phlegm and snot doesn't spray into the air when i sneeze or cough.
 
Our company was shot down for 2 months because of governor's orders, but now we are all working again. None of our crew has caught the virus, all of us wear our masks here at work when we have to interact or are within 10 ft of each other. Our small operation cannot survive if we get sick, so the mask is a small inconvenience.
 
Just heard the governor may shut our state down again because of a surge of rising cases. Hope not because right now we are going gang busters and want to produce and ship product. Our competitors overseas have no restrictions now and are eager to put US companies out of business. Is that enough reason to don a mask in public? I hope so.
 
Rolando
 
 
-----Original Message-----
From: ROBERT WYNNE <robert-wynne@...>
To: main@ap-ug.groups.io; Roland Christen via groups.io <chris1011@...>; main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Sat, Aug 1, 2020 5:15 pm
Subject: Re: [ap-ug] To mask or not to mask, that is the question
Maybe this is putting too fine a point on topic without any humor; but from
N95 masks are designed to remove more than 95% of all particles that are at least 0.3 microns (µm) in diameter. In fact, measurements of the particle filtration efficiency of N95 masks show that they are capable of filtering ≈99.8% of particles with a diameter of ≈0.1 μm (Rengasamy et al., 2017). SARS-CoV-2 is an enveloped virus ≈0.1 μm in diameter, so N95 masks are capable of filtering most free virions, but they do more than that. How so? Viruses are often transmitted through respiratory droplets produced by coughing and sneezing. Respiratory droplets are usually divided into two size bins, large droplets (>5 μm in diameter) that fall rapidly to the ground and are thus transmitted only over short distances, and small droplets (≤5 μm in diameter). Small droplets can evaporate into 'droplet nuclei', remain suspended in air for significant periods of time and could be inhaled. Some viruses, such as measles, can be transmitted by droplet nuclei (Tellier et al., 2019). Larger droplets are also known to transmit viruses, usually by settling onto surfaces that are touched and transported by hands onto mucosal membranes such as the eyes, nose and mouth (CDC, 2020). The characteristic diameter of large droplets produced by sneezing is ~100 μm (Han et al., 2013), while the diameter of droplet nuclei produced by coughing is on the order of ~1 μm (Yang et al., 2007). At present, it is unclear whether surfaces or air are the dominant mode of SARS-CoV-2 transmission, but N95 masks should provide some protection against both (Jefferson et al., 2009Leung et al., 2020).
On 08/01/2020 2:37 PM Roland Christen via groups.io <chris1011@...> wrote:
 
 
Hi Astronuts,
 
This is completely off-topic. My daughter sent me this funny video which attempts to answer today's most pressing question. What are masks for and do they really work? The video is funny and completely non-political. It's in the style of the old Myth Buster's TV programs where they were always blowing things up or burning them down. So, if you have a few minutes to spare, sit down and watch this:
 
Love ya all and stay healthy,
Rolando Kissing heart


locked Re: [ap-ug] To mask or not to mask, that is the question

thefamily90 Phillips
 

I wear a mask when out in public or when dealing with patients in the Dermatopathology office down the hall. As a dermatopathologist I read skin margins for excision of cancers while the patient is in the office. I have to have contact with the physician and often go into the dermatology office during the procedure. I wear a mask then. I don’t really know whether it is doing anyone any good or not, but I know if I don’t wear one I will make others nervous and there is no need to do that.


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of uncarollo2 <chris1011@...> via groups.io <chris1011@...>
Sent: Saturday, August 1, 2020 8:01:27 PM
To: rdcrisp@... <rdcrisp@...>; main@ap-ug.groups.io <main@ap-ug.groups.io>; robert-wynne@... <robert-wynne@...>; main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] [ap-ug] To mask or not to mask, that is the question
 
It takes a while to get used to it. Just like it took a year to begin wearing seatbelts back in 1960. But now it's automatic. I don't even think about seatbelts, they just seem to attach themselves.

Rolando Blush


-----Original Message-----
From: Richard Crisp <rdcrisp@...>
To: main@ap-ug.groups.io; robert-wynne@...; main@ap-gto.groups.io
Sent: Sat, Aug 1, 2020 6:11 pm
Subject: Re: [ap-ug] To mask or not to mask, that is the question

I figure there are three scenarios of interest re: masks
 
  1. Preventing you from inhaling viruses
  2. Limiting the range of your phlegm
  3. Keeping you from touching your nose and mouth etc
 
I figure 1 is about like expecting chicken wire to keep mosquitoes out
#2 is reasonable and a kind thing to do for your fellow man (this is S.O.P. in Japan for decades btw) and #3 is a dead on BULLSEYE for me
 
It’s a constant battle for me to try to remember to keep my hands away from my face/eyes.
 
Not sure about you, but it’s hard for me to break habits that are going on their 7th decade!
 
 
 
From: main@ap-ug.groups.io <main@ap-ug.groups.io> On Behalf Of Roland Christen via groups.io
Sent: Saturday, August 1, 2020 3:31 PM
To: robert-wynne@...; main@ap-ug.groups.io; chris1011@...; main@ap-gto.groups.io
Subject: Re: [ap-ug] To mask or not to mask, that is the question
 
Yes, maybe a fine point.
I wear one not for my own protection because breathing in doesn't prevent my getting a lung full of critters. My mask is for the protection of other people so that my phlegm and snot doesn't spray into the air when i sneeze or cough.
 
Our company was shot down for 2 months because of governor's orders, but now we are all working again. None of our crew has caught the virus, all of us wear our masks here at work when we have to interact or are within 10 ft of each other. Our small operation cannot survive if we get sick, so the mask is a small inconvenience.
 
Just heard the governor may shut our state down again because of a surge of rising cases. Hope not because right now we are going gang busters and want to produce and ship product. Our competitors overseas have no restrictions now and are eager to put US companies out of business. Is that enough reason to don a mask in public? I hope so.
 
Rolando
 
 
-----Original Message-----
From: ROBERT WYNNE <robert-wynne@...>
To: main@ap-ug.groups.io; Roland Christen via groups.io <chris1011@...>; main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Sat, Aug 1, 2020 5:15 pm
Subject: Re: [ap-ug] To mask or not to mask, that is the question
Maybe this is putting too fine a point on topic without any humor; but from
N95 masks are designed to remove more than 95% of all particles that are at least 0.3 microns (µm) in diameter. In fact, measurements of the particle filtration efficiency of N95 masks show that they are capable of filtering ≈99.8% of particles with a diameter of ≈0.1 μm (Rengasamy et al., 2017). SARS-CoV-2 is an enveloped virus ≈0.1 μm in diameter, so N95 masks are capable of filtering most free virions, but they do more than that. How so? Viruses are often transmitted through respiratory droplets produced by coughing and sneezing. Respiratory droplets are usually divided into two size bins, large droplets (>5 μm in diameter) that fall rapidly to the ground and are thus transmitted only over short distances, and small droplets (≤5 μm in diameter). Small droplets can evaporate into 'droplet nuclei', remain suspended in air for significant periods of time and could be inhaled. Some viruses, such as measles, can be transmitted by droplet nuclei (Tellier et al., 2019). Larger droplets are also known to transmit viruses, usually by settling onto surfaces that are touched and transported by hands onto mucosal membranes such as the eyes, nose and mouth (CDC, 2020). The characteristic diameter of large droplets produced by sneezing is ~100 μm (Han et al., 2013), while the diameter of droplet nuclei produced by coughing is on the order of ~1 μm (Yang et al., 2007). At present, it is unclear whether surfaces or air are the dominant mode of SARS-CoV-2 transmission, but N95 masks should provide some protection against both (Jefferson et al., 2009Leung et al., 2020).
On 08/01/2020 2:37 PM Roland Christen via groups.io <chris1011@...> wrote:
 
 
Hi Astronuts,
 
This is completely off-topic. My daughter sent me this funny video which attempts to answer today's most pressing question. What are masks for and do they really work? The video is funny and completely non-political. It's in the style of the old Myth Buster's TV programs where they were always blowing things up or burning them down. So, if you have a few minutes to spare, sit down and watch this:
 
Love ya all and stay healthy,
Rolando Kissing heart


Re: Pelican Nebula and M33

Robert Chozick
 

I enjoyed the discussion.  I actually took the second version I did for this and combined it 25% with the first one and like it better.


I like the control and manipulation in Photoshop.  I just combined 2 versions in a few seconds.  I prefer painting to pixel math.

Robert

On Aug 1, 2020, at 10:11 PM, Stuart <stuart.j.heggie@...> wrote:

Robert, you are right, we did talk about this before - I forgot - apologies!

I appreciate the detailed description of your workflow. I tend to start in PI and move to PS only at the end. I've not had enough (any?) experience with Nebulosity to know what it does but I've heard lots of good things about it.

For sure this is art more than science. Especially when it comes to "pretty pictures". I was very curious if you found the OSC camera made it easier or harder to achieve a pleasing balance. Either way, the steps you describe give you the control you need to produce the image you're looking for. I think both were very pleasing. Just curious about the colour balance using a OSC. 


On Sat, 1 Aug 2020 at 23:00, Robert Chozick via groups.io <rchozick=aol.com@groups.io> wrote:
Thanks Stuart.  I think we have had this discussion before.  I do use Photometric Color Calibration in PI.  I pre process in Nebulosity (I am a Mac user) then I go to PI and use SCNR to remove green, Photometric Color Calibration and DBE.  Then I go back to Nebulosity to use its Digital Development for its final stretch to a 16 bit Tiff for Photoshop.  Then I finish the rest of the way in Photoshop.  I have attached what M33 looked like when it went to Photoshop:


I did a quick processing in Photoshop without the galaxy color change described below.  I just took a bit of green out.


When I do galaxies I use Curves in Photoshop to bring up the red in the core and blue in the arms.  These are slight adjustments at specific points with the opposite color being reduced where the other is increased.  I manually play to create which part of the galaxy becomes core and which part starts the arms.  I know this is not kosher to many but I am not trying for exact reproduction.  I think of it as art more than science.  In the end I am not trying to get the exact colors just what looks nice to me.  I do think I overdid it the effect on this one.

Again the version I posted tonight


I did M33 a while ago without doing the color correction.  This one was LRGB plus a good amount of Ha.


I intend to get a lot more subs of M33 and also adding Ha.  The one I posted tonight was really only meant to be a test of the new camera.

Robert

On Aug 1, 2020, at 8:09 PM, Stuart <stuart.j.heggie@...> wrote:

Robert, both of these shots are really nice! I have been going back and forth on them and wonder about the constraints that OSC cameras put on you for colour. How do you calibrate them for colour? I shoot monochrome with filters and use PixInsight's PhotometricColorCalibration tool which is simply amazing. 

I mention this because the M33 shot seems like it could stand a tweak on colour but not an arbitrary one to "make it look like everyone else's". You mention that you use PixInsight. Have you tried that calibration tool?


On Sat, 1 Aug 2020 at 16:48, Robert Chozick via groups.io <rchozick=aol.com@groups.io> wrote:
I got a few more images from my test trip for my new ASI2600 CMOS color camera. 

Pelican Nebula

The bright stars in the Pelican got blown out and really unfixable with the shorter exposure subs so I learned that 5 min at f5 is too much with this camera when bright stars are present.  There was also a reflection in the right upper corner that I think I can fix by bringing the UV-IR filter closer to the sensor.  On the FSQ the CA-35 camera adapter allows a 2 inch filter to be screwed in but it is 30-40mm away from the sensor.  I am getting a ZWO filter drawer to bring it closer.  Hopefully that will fix it. 


M33

I needed more data on M33 and some Ha but I was surprised at the quality of the data for only 2.5 hours.


I need to try to always get more data on images.  In the past I have wanted to get a lot of images on every trip since it is so rare I go but I am going to try to get at least 5-6 hours of data at f5 and 8-12 hours at f8 from now on.

Robert Chozick






-- 

Stuart
http://www.astrofoto.ca/stuartheggie/

Robert Chozick






-- 

Stuart
http://www.astrofoto.ca/stuartheggie/

Robert Chozick




Re: large alignment error with polemaster & mach2

Robert Chozick
 

What degree of polar alignment do most find workable?  I find that Polemaster gets me from 30 arc seconds to one arc minute polar alignment.  Shouldn’t 1 arc minute be sufficient for guiding in most cases?

Robert


On Aug 1, 2020, at 5:53 PM, uncarollo2 <chris1011@...> via groups.io <chris1011@...> wrote:

Here is some more information:

Note, this covers only the RA drift rate. Dec drift will also always be there no matter how you polar align.

Rolando



-----Original Message-----
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Sat, Aug 1, 2020 5:51 pm
Subject: Re: [ap-gto] large alignment error with polemaster & mach2

The RA tracking rate can vary anywhere from 35 to 70 arc seconds per hour (0.6 to 1.5 arc sec per minute) between the zenith and +- 3 hours from the zenith. The rate of drift is not linear. Modeling creates a drift curve for each point in the sky over the modeled track. The link below can tell you the actual tracking rate for different points in the sky:


These are approximate and depend on perfect polar alignment and not scope flex. In reality the drift can be worse if everything is not perfect. The calculations cover only the atmospheric refraction at nominal temperature and pressure.

Rolando



-----Original Message-----
From: Andrea Lucchetti <andlucchett@...>
To: main@ap-gto.groups.io
Sent: Sat, Aug 1, 2020 5:35 pm
Subject: Re: [ap-gto] large alignment error with polemaster & mach2

Hi Roland,
I always thought the refraction effect depends on latitude, but can be taken into account using the refracted pole.
do you think the effect is so  big at my latitude?
I leave and image at 42 deg north.

Or do you mean refraction due to altitude over the horizon?

In both cases, I don't understand why I need a model, unless you mean a model with different atmospheric parameters (i.e pressure and temp).
If these are not adjusted night after night , the refraction effect should be  a "factor" not requiring modeling.
It should be just calculated.
Am I missing something?
Thank you again,
Andrea

Robert Chozick




Re: Pelican Nebula and M33

Stuart <stuart.j.heggie@...>
 

Robert, you are right, we did talk about this before - I forgot - apologies!

I appreciate the detailed description of your workflow. I tend to start in PI and move to PS only at the end. I've not had enough (any?) experience with Nebulosity to know what it does but I've heard lots of good things about it.

For sure this is art more than science. Especially when it comes to "pretty pictures". I was very curious if you found the OSC camera made it easier or harder to achieve a pleasing balance. Either way, the steps you describe give you the control you need to produce the image you're looking for. I think both were very pleasing. Just curious about the colour balance using a OSC. 


On Sat, 1 Aug 2020 at 23:00, Robert Chozick via groups.io <rchozick=aol.com@groups.io> wrote:
Thanks Stuart.  I think we have had this discussion before.  I do use Photometric Color Calibration in PI.  I pre process in Nebulosity (I am a Mac user) then I go to PI and use SCNR to remove green, Photometric Color Calibration and DBE.  Then I go back to Nebulosity to use its Digital Development for its final stretch to a 16 bit Tiff for Photoshop.  Then I finish the rest of the way in Photoshop.  I have attached what M33 looked like when it went to Photoshop:


I did a quick processing in Photoshop without the galaxy color change described below.  I just took a bit of green out.


When I do galaxies I use Curves in Photoshop to bring up the red in the core and blue in the arms.  These are slight adjustments at specific points with the opposite color being reduced where the other is increased.  I manually play to create which part of the galaxy becomes core and which part starts the arms.  I know this is not kosher to many but I am not trying for exact reproduction.  I think of it as art more than science.  In the end I am not trying to get the exact colors just what looks nice to me.  I do think I overdid it the effect on this one.

Again the version I posted tonight


I did M33 a while ago without doing the color correction.  This one was LRGB plus a good amount of Ha.


I intend to get a lot more subs of M33 and also adding Ha.  The one I posted tonight was really only meant to be a test of the new camera.

Robert

On Aug 1, 2020, at 8:09 PM, Stuart <stuart.j.heggie@...> wrote:

Robert, both of these shots are really nice! I have been going back and forth on them and wonder about the constraints that OSC cameras put on you for colour. How do you calibrate them for colour? I shoot monochrome with filters and use PixInsight's PhotometricColorCalibration tool which is simply amazing. 

I mention this because the M33 shot seems like it could stand a tweak on colour but not an arbitrary one to "make it look like everyone else's". You mention that you use PixInsight. Have you tried that calibration tool?


On Sat, 1 Aug 2020 at 16:48, Robert Chozick via groups.io <rchozick=aol.com@groups.io> wrote:
I got a few more images from my test trip for my new ASI2600 CMOS color camera. 

Pelican Nebula

The bright stars in the Pelican got blown out and really unfixable with the shorter exposure subs so I learned that 5 min at f5 is too much with this camera when bright stars are present.  There was also a reflection in the right upper corner that I think I can fix by bringing the UV-IR filter closer to the sensor.  On the FSQ the CA-35 camera adapter allows a 2 inch filter to be screwed in but it is 30-40mm away from the sensor.  I am getting a ZWO filter drawer to bring it closer.  Hopefully that will fix it. 


M33

I needed more data on M33 and some Ha but I was surprised at the quality of the data for only 2.5 hours.


I need to try to always get more data on images.  In the past I have wanted to get a lot of images on every trip since it is so rare I go but I am going to try to get at least 5-6 hours of data at f5 and 8-12 hours at f8 from now on.

Robert Chozick






--

Stuart
http://www.astrofoto.ca/stuartheggie/

Robert Chozick




--

Stuart
http://www.astrofoto.ca/stuartheggie/


Re: Pelican Nebula and M33

Robert Chozick
 

Thanks Stuart.  I think we have had this discussion before.  I do use Photometric Color Calibration in PI.  I pre process in Nebulosity (I am a Mac user) then I go to PI and use SCNR to remove green, Photometric Color Calibration and DBE.  Then I go back to Nebulosity to use its Digital Development for its final stretch to a 16 bit Tiff for Photoshop.  Then I finish the rest of the way in Photoshop.  I have attached what M33 looked like when it went to Photoshop:


I did a quick processing in Photoshop without the galaxy color change described below.  I just took a bit of green out.


When I do galaxies I use Curves in Photoshop to bring up the red in the core and blue in the arms.  These are slight adjustments at specific points with the opposite color being reduced where the other is increased.  I manually play to create which part of the galaxy becomes core and which part starts the arms.  I know this is not kosher to many but I am not trying for exact reproduction.  I think of it as art more than science.  In the end I am not trying to get the exact colors just what looks nice to me.  I do think I overdid it the effect on this one.

Again the version I posted tonight


I did M33 a while ago without doing the color correction.  This one was LRGB plus a good amount of Ha.


I intend to get a lot more subs of M33 and also adding Ha.  The one I posted tonight was really only meant to be a test of the new camera.

Robert

On Aug 1, 2020, at 8:09 PM, Stuart <stuart.j.heggie@...> wrote:

Robert, both of these shots are really nice! I have been going back and forth on them and wonder about the constraints that OSC cameras put on you for colour. How do you calibrate them for colour? I shoot monochrome with filters and use PixInsight's PhotometricColorCalibration tool which is simply amazing. 

I mention this because the M33 shot seems like it could stand a tweak on colour but not an arbitrary one to "make it look like everyone else's". You mention that you use PixInsight. Have you tried that calibration tool?


On Sat, 1 Aug 2020 at 16:48, Robert Chozick via groups.io <rchozick=aol.com@groups.io> wrote:
I got a few more images from my test trip for my new ASI2600 CMOS color camera. 

Pelican Nebula

The bright stars in the Pelican got blown out and really unfixable with the shorter exposure subs so I learned that 5 min at f5 is too much with this camera when bright stars are present.  There was also a reflection in the right upper corner that I think I can fix by bringing the UV-IR filter closer to the sensor.  On the FSQ the CA-35 camera adapter allows a 2 inch filter to be screwed in but it is 30-40mm away from the sensor.  I am getting a ZWO filter drawer to bring it closer.  Hopefully that will fix it. 


M33

I needed more data on M33 and some Ha but I was surprised at the quality of the data for only 2.5 hours.


I need to try to always get more data on images.  In the past I have wanted to get a lot of images on every trip since it is so rare I go but I am going to try to get at least 5-6 hours of data at f5 and 8-12 hours at f8 from now on.

Robert Chozick






--

Stuart
http://www.astrofoto.ca/stuartheggie/

Robert Chozick




Re: To mask or not to mask, that is the question

Robert Sinitiere
 

Funny but good video.....So, wear your Masks, for astronauts and non astronuts!
Be Safe everyone at Astro-Physics, and everyone else out there.  I was a unit based pharmacist and infusion pharmacist for 43 years.  I’m 70 now, and I’m sure masks played some part in my survival, for N95 PPE’s on the units, and self preservation PPE’s
compounding some fairly toxic chemotherapy agents.  Let’s all survive to see 2021!!
CLEAR SKIES!!



On Aug 1, 2020, at 4:38 PM, uncarollo2 <chris1011@...> via groups.io <chris1011@...> wrote:


Hi Astronuts,

This is completely off-topic. My daughter sent me this funny video which attempts to answer today's most pressing question. What are masks for and do they really work? The video is funny and completely non-political. It's in the style of the old Myth Buster's TV programs where they were always blowing things up or burning them down. So, if you have a few minutes to spare, sit down and watch this:

Love ya all and stay healthy,
Rolando Kissing heart


Re: Pelican Nebula and M33

DFisch
 



On Sat, Aug 1, 2020 at 21:09 Stuart <stuart.j.heggie@...> wrote:
Robert, both of these shots are really nice! I have been going back and forth on them and wonder about the constraints that OSC cameras put on you for colour. How do you calibrate them for colour? I shoot monochrome with filters and use PixInsight's PhotometricColorCalibration tool which is simply amazing. 

I mention this because the M33 shot seems like it could stand a tweak on colour but not an arbitrary one to "make it look like everyone else's". You mention that you use PixInsight. Have you tried that calibration tool?


On Sat, 1 Aug 2020 at 16:48, Robert Chozick via groups.io <rchozick=aol.com@groups.io> wrote:
I got a few more images from my test trip for my new ASI2600 CMOS color camera. 

Pelican Nebula

The bright stars in the Pelican got blown out and really unfixable with the shorter exposure subs so I learned that 5 min at f5 is too much with this camera when bright stars are present.  There was also a reflection in the right upper corner that I think I can fix by bringing the UV-IR filter closer to the sensor.  On the FSQ the CA-35 camera adapter allows a 2 inch filter to be screwed in but it is 30-40mm away from the sensor.  I am getting a ZWO filter drawer to bring it closer.  Hopefully that will fix it. 


M33

I needed more data on M33 and some Ha but I was surprised at the quality of the data for only 2.5 hours.


I need to try to always get more data on images.  In the past I have wanted to get a lot of images on every trip since it is so rare I go but I am going to try to get at least 5-6 hours of data at f5 and 8-12 hours at f8 from now on.

Robert Chozick




--

Stuart
http://www.astrofoto.ca/stuartheggie/

--
TJF MOBILE


Re: Pelican Nebula and M33

Stuart <stuart.j.heggie@...>
 

Robert, both of these shots are really nice! I have been going back and forth on them and wonder about the constraints that OSC cameras put on you for colour. How do you calibrate them for colour? I shoot monochrome with filters and use PixInsight's PhotometricColorCalibration tool which is simply amazing. 

I mention this because the M33 shot seems like it could stand a tweak on colour but not an arbitrary one to "make it look like everyone else's". You mention that you use PixInsight. Have you tried that calibration tool?


On Sat, 1 Aug 2020 at 16:48, Robert Chozick via groups.io <rchozick=aol.com@groups.io> wrote:
I got a few more images from my test trip for my new ASI2600 CMOS color camera. 

Pelican Nebula

The bright stars in the Pelican got blown out and really unfixable with the shorter exposure subs so I learned that 5 min at f5 is too much with this camera when bright stars are present.  There was also a reflection in the right upper corner that I think I can fix by bringing the UV-IR filter closer to the sensor.  On the FSQ the CA-35 camera adapter allows a 2 inch filter to be screwed in but it is 30-40mm away from the sensor.  I am getting a ZWO filter drawer to bring it closer.  Hopefully that will fix it. 


M33

I needed more data on M33 and some Ha but I was surprised at the quality of the data for only 2.5 hours.


I need to try to always get more data on images.  In the past I have wanted to get a lot of images on every trip since it is so rare I go but I am going to try to get at least 5-6 hours of data at f5 and 8-12 hours at f8 from now on.

Robert Chozick




--

Stuart
http://www.astrofoto.ca/stuartheggie/


locked Re: [ap-ug] To mask or not to mask, that is the question

Pete Lardizabal
 

I’ve had a recent exposure to a COVID-19 positive member I supervise and thankfully none of us in my Unit have come down with this virus. Our Sheriffs Office has had over 200 members infected in the past few months. 

Wear a mask 😷 when interacting with others. The primary value is minimizing transmission to others. N95 masks are less common and provide some protection in receiving the virus from others. Common masks do a good job of preventing transmitting the virus. 

A 52 year old VERY fit colleague (prior to being infected) of mine has been in ICU for 4 weeks now. Other members of his Unit have recovered but Chris has a long road in front of him for recovery. 

Be Safe out there my friends!

🤗

Pete

On Aug 1, 2020, at 8:01 PM, Roland Christen via groups.io <chris1011@...> wrote:


It takes a while to get used to it. Just like it took a year to begin wearing seatbelts back in 1960. But now it's automatic. I don't even think about seatbelts, they just seem to attach themselves.

Rolando Blush


-----Original Message-----
From: Richard Crisp <rdcrisp@...>
To: main@ap-ug.groups.io; robert-wynne@...; main@ap-gto.groups.io
Sent: Sat, Aug 1, 2020 6:11 pm
Subject: Re: [ap-ug] To mask or not to mask, that is the question

I figure there are three scenarios of interest re: masks
 
  1. Preventing you from inhaling viruses
  2. Limiting the range of your phlegm
  3. Keeping you from touching your nose and mouth etc
 
I figure 1 is about like expecting chicken wire to keep mosquitoes out
#2 is reasonable and a kind thing to do for your fellow man (this is S.O.P. in Japan for decades btw) and #3 is a dead on BULLSEYE for me
 
It’s a constant battle for me to try to remember to keep my hands away from my face/eyes.
 
Not sure about you, but it’s hard for me to break habits that are going on their 7th decade!
 
 
 
From: main@ap-ug.groups.io <main@ap-ug.groups.io> On Behalf Of Roland Christen via groups.io
Sent: Saturday, August 1, 2020 3:31 PM
To: robert-wynne@...; main@ap-ug.groups.io; chris1011@...; main@ap-gto.groups.io
Subject: Re: [ap-ug] To mask or not to mask, that is the question
 
Yes, maybe a fine point.
I wear one not for my own protection because breathing in doesn't prevent my getting a lung full of critters. My mask is for the protection of other people so that my phlegm and snot doesn't spray into the air when i sneeze or cough.
 
Our company was shot down for 2 months because of governor's orders, but now we are all working again. None of our crew has caught the virus, all of us wear our masks here at work when we have to interact or are within 10 ft of each other. Our small operation cannot survive if we get sick, so the mask is a small inconvenience.
 
Just heard the governor may shut our state down again because of a surge of rising cases. Hope not because right now we are going gang busters and want to produce and ship product. Our competitors overseas have no restrictions now and are eager to put US companies out of business. Is that enough reason to don a mask in public? I hope so.
 
Rolando
 
 
-----Original Message-----
From: ROBERT WYNNE <robert-wynne@...>
To: main@ap-ug.groups.io; Roland Christen via groups.io <chris1011@...>; main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Sat, Aug 1, 2020 5:15 pm
Subject: Re: [ap-ug] To mask or not to mask, that is the question
Maybe this is putting too fine a point on topic without any humor; but from
N95 masks are designed to remove more than 95% of all particles that are at least 0.3 microns (µm) in diameter. In fact, measurements of the particle filtration efficiency of N95 masks show that they are capable of filtering ≈99.8% of particles with a diameter of ≈0.1 μm (Rengasamy et al., 2017). SARS-CoV-2 is an enveloped virus ≈0.1 μm in diameter, so N95 masks are capable of filtering most free virions, but they do more than that. How so? Viruses are often transmitted through respiratory droplets produced by coughing and sneezing. Respiratory droplets are usually divided into two size bins, large droplets (>5 μm in diameter) that fall rapidly to the ground and are thus transmitted only over short distances, and small droplets (≤5 μm in diameter). Small droplets can evaporate into 'droplet nuclei', remain suspended in air for significant periods of time and could be inhaled. Some viruses, such as measles, can be transmitted by droplet nuclei (Tellier et al., 2019). Larger droplets are also known to transmit viruses, usually by settling onto surfaces that are touched and transported by hands onto mucosal membranes such as the eyes, nose and mouth (CDC, 2020). The characteristic diameter of large droplets produced by sneezing is ~100 μm (Han et al., 2013), while the diameter of droplet nuclei produced by coughing is on the order of ~1 μm (Yang et al., 2007). At present, it is unclear whether surfaces or air are the dominant mode of SARS-CoV-2 transmission, but N95 masks should provide some protection against both (Jefferson et al., 2009Leung et al., 2020).
On 08/01/2020 2:37 PM Roland Christen via groups.io <chris1011@...> wrote:
 
 
Hi Astronuts,
 
This is completely off-topic. My daughter sent me this funny video which attempts to answer today's most pressing question. What are masks for and do they really work? The video is funny and completely non-political. It's in the style of the old Myth Buster's TV programs where they were always blowing things up or burning them down. So, if you have a few minutes to spare, sit down and watch this:
 
Love ya all and stay healthy,
Rolando Kissing heart


locked Re: [ap-ug] To mask or not to mask, that is the question

Richard Crisp
 

I figure there are three scenarios of interest re: masks

 

  1. Preventing you from inhaling viruses
  2. Limiting the range of your phlegm
  3. Keeping you from touching your nose and mouth etc

 

I figure 1 is about like expecting chicken wire to keep mosquitoes out

#2 is reasonable and a kind thing to do for your fellow man (this is S.O.P. in Japan for decades btw) and #3 is a dead on BULLSEYE for me

 

It’s a constant battle for me to try to remember to keep my hands away from my face/eyes.

 

Not sure about you, but it’s hard for me to break habits that are going on their 7th decade!

 

 

 

From: main@ap-ug.groups.io <main@ap-ug.groups.io> On Behalf Of Roland Christen via groups.io
Sent: Saturday, August 1, 2020 3:31 PM
To: robert-wynne@...; main@ap-ug.groups.io; chris1011@...; main@ap-gto.groups.io
Subject: Re: [ap-ug] To mask or not to mask, that is the question

 

Yes, maybe a fine point.

I wear one not for my own protection because breathing in doesn't prevent my getting a lung full of critters. My mask is for the protection of other people so that my phlegm and snot doesn't spray into the air when i sneeze or cough.

 

Our company was shot down for 2 months because of governor's orders, but now we are all working again. None of our crew has caught the virus, all of us wear our masks here at work when we have to interact or are within 10 ft of each other. Our small operation cannot survive if we get sick, so the mask is a small inconvenience.

 

Just heard the governor may shut our state down again because of a surge of rising cases. Hope not because right now we are going gang busters and want to produce and ship product. Our competitors overseas have no restrictions now and are eager to put US companies out of business. Is that enough reason to don a mask in public? I hope so.

 

Rolando

 

 

-----Original Message-----
From: ROBERT WYNNE <robert-wynne@...>
To: main@ap-ug.groups.io; Roland Christen via groups.io <chris1011@...>; main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Sat, Aug 1, 2020 5:15 pm
Subject: Re: [ap-ug] To mask or not to mask, that is the question

Maybe this is putting too fine a point on topic without any humor; but from

N95 masks are designed to remove more than 95% of all particles that are at least 0.3 microns (µm) in diameter. In fact, measurements of the particle filtration efficiency of N95 masks show that they are capable of filtering ≈99.8% of particles with a diameter of ≈0.1 μm (Rengasamy et al., 2017). SARS-CoV-2 is an enveloped virus ≈0.1 μm in diameter, so N95 masks are capable of filtering most free virions, but they do more than that. How so? Viruses are often transmitted through respiratory droplets produced by coughing and sneezing. Respiratory droplets are usually divided into two size bins, large droplets (>5 μm in diameter) that fall rapidly to the ground and are thus transmitted only over short distances, and small droplets (≤5 μm in diameter). Small droplets can evaporate into 'droplet nuclei', remain suspended in air for significant periods of time and could be inhaled. Some viruses, such as measles, can be transmitted by droplet nuclei (Tellier et al., 2019). Larger droplets are also known to transmit viruses, usually by settling onto surfaces that are touched and transported by hands onto mucosal membranes such as the eyes, nose and mouth (CDC, 2020). The characteristic diameter of large droplets produced by sneezing is ~100 μm (Han et al., 2013), while the diameter of droplet nuclei produced by coughing is on the order of ~1 μm (Yang et al., 2007). At present, it is unclear whether surfaces or air are the dominant mode of SARS-CoV-2 transmission, but N95 masks should provide some protection against both (Jefferson et al., 2009Leung et al., 2020).

On 08/01/2020 2:37 PM Roland Christen via groups.io <chris1011@...> wrote:

 

 

Hi Astronuts,

 

This is completely off-topic. My daughter sent me this funny video which attempts to answer today's most pressing question. What are masks for and do they really work? The video is funny and completely non-political. It's in the style of the old Myth Buster's TV programs where they were always blowing things up or burning them down. So, if you have a few minutes to spare, sit down and watch this:

 

Love ya all and stay healthy,

Rolando Kissing heart


Re: OFF TOPIC: Duplication of Group messages - tagged as “[Edited Message Follows]”

jimmyjujames
 

 
I'm guilty as charged.
 
Before groups.io
If a saw an big error or link was not clickable.
I would to delete and resend a corrected message.
I normally compose message in notepad++, copy, paste and send.
 
If a link was not clickable, I have found adding a return at end 
of link will make it clickable and then I delete the next blank line.
That would make the message seem unchanged.

I don't want members to have to select, copy and paste to go to a link.
If it was an un-clickable link edit, you may not see a difference.
 
After switching to groups.io
I don't have to delete message but can edit an existing message.
I don't desire to resend message to group but only 2 choices.
It's either "Resend to Group" or ''Discard''.
 
I would like another button "Save work and exit without resending to group"
 
My edits are for those that search for old messages and I want mine as correct
 as I can get them with all links clickable.
 
In groups.io if you click on the ''Edited on date'' it will display a list of revisions.
You check-mark any 2 and click compare button to see what was changed.
 
November 2019 was a message I sent on Orthogonality and 
I did indeed edit that one many times maybe 10 times
Each message is different if only 1 word (no links to correct in that message).
 
As I re-read message or members comment,
 I would edit to make message hopefully easier too understand.
 
Jimmy
33.6N, 88.6W
I've got nothing to do and all day to do it I'm retired!
 


Re: To mask or not to mask, that is the question

Roland Christen
 

Victory hand



-----Original Message-----
From: jimmyjujames <jimmy_an@...>
To: main@ap-gto.groups.io
Sent: Sat, Aug 1, 2020 6:33 pm
Subject: Re: [ap-gto] To mask or not to mask, that is the question

 
Thank you for the mask link.
Funny and makes a point.
 
I sent it to 19 family and friends.
Took a screen shot of hit count and 30 minutes later it had increased 9,000 hits.
It's going viral on the virus.

Thanks
Jimmy
Think Again!
 


locked Re: [ap-ug] To mask or not to mask, that is the question

Roland Christen
 

It takes a while to get used to it. Just like it took a year to begin wearing seatbelts back in 1960. But now it's automatic. I don't even think about seatbelts, they just seem to attach themselves.

Rolando Blush


-----Original Message-----
From: Richard Crisp <rdcrisp@...>
To: main@ap-ug.groups.io; robert-wynne@...; main@ap-gto.groups.io
Sent: Sat, Aug 1, 2020 6:11 pm
Subject: Re: [ap-ug] To mask or not to mask, that is the question

I figure there are three scenarios of interest re: masks
 
  1. Preventing you from inhaling viruses
  2. Limiting the range of your phlegm
  3. Keeping you from touching your nose and mouth etc
 
I figure 1 is about like expecting chicken wire to keep mosquitoes out
#2 is reasonable and a kind thing to do for your fellow man (this is S.O.P. in Japan for decades btw) and #3 is a dead on BULLSEYE for me
 
It’s a constant battle for me to try to remember to keep my hands away from my face/eyes.
 
Not sure about you, but it’s hard for me to break habits that are going on their 7th decade!
 
 
 
From: main@ap-ug.groups.io <main@ap-ug.groups.io> On Behalf Of Roland Christen via groups.io
Sent: Saturday, August 1, 2020 3:31 PM
To: robert-wynne@...; main@ap-ug.groups.io; chris1011@...; main@ap-gto.groups.io
Subject: Re: [ap-ug] To mask or not to mask, that is the question
 
Yes, maybe a fine point.
I wear one not for my own protection because breathing in doesn't prevent my getting a lung full of critters. My mask is for the protection of other people so that my phlegm and snot doesn't spray into the air when i sneeze or cough.
 
Our company was shot down for 2 months because of governor's orders, but now we are all working again. None of our crew has caught the virus, all of us wear our masks here at work when we have to interact or are within 10 ft of each other. Our small operation cannot survive if we get sick, so the mask is a small inconvenience.
 
Just heard the governor may shut our state down again because of a surge of rising cases. Hope not because right now we are going gang busters and want to produce and ship product. Our competitors overseas have no restrictions now and are eager to put US companies out of business. Is that enough reason to don a mask in public? I hope so.
 
Rolando
 
 
-----Original Message-----
From: ROBERT WYNNE <robert-wynne@...>
To: main@ap-ug.groups.io; Roland Christen via groups.io <chris1011@...>; main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Sat, Aug 1, 2020 5:15 pm
Subject: Re: [ap-ug] To mask or not to mask, that is the question
Maybe this is putting too fine a point on topic without any humor; but from
N95 masks are designed to remove more than 95% of all particles that are at least 0.3 microns (µm) in diameter. In fact, measurements of the particle filtration efficiency of N95 masks show that they are capable of filtering ≈99.8% of particles with a diameter of ≈0.1 μm (Rengasamy et al., 2017). SARS-CoV-2 is an enveloped virus ≈0.1 μm in diameter, so N95 masks are capable of filtering most free virions, but they do more than that. How so? Viruses are often transmitted through respiratory droplets produced by coughing and sneezing. Respiratory droplets are usually divided into two size bins, large droplets (>5 μm in diameter) that fall rapidly to the ground and are thus transmitted only over short distances, and small droplets (≤5 μm in diameter). Small droplets can evaporate into 'droplet nuclei', remain suspended in air for significant periods of time and could be inhaled. Some viruses, such as measles, can be transmitted by droplet nuclei (Tellier et al., 2019). Larger droplets are also known to transmit viruses, usually by settling onto surfaces that are touched and transported by hands onto mucosal membranes such as the eyes, nose and mouth (CDC, 2020). The characteristic diameter of large droplets produced by sneezing is ~100 μm (Han et al., 2013), while the diameter of droplet nuclei produced by coughing is on the order of ~1 μm (Yang et al., 2007). At present, it is unclear whether surfaces or air are the dominant mode of SARS-CoV-2 transmission, but N95 masks should provide some protection against both (Jefferson et al., 2009Leung et al., 2020).
On 08/01/2020 2:37 PM Roland Christen via groups.io <chris1011@...> wrote:
 
 
Hi Astronuts,
 
This is completely off-topic. My daughter sent me this funny video which attempts to answer today's most pressing question. What are masks for and do they really work? The video is funny and completely non-political. It's in the style of the old Myth Buster's TV programs where they were always blowing things up or burning them down. So, if you have a few minutes to spare, sit down and watch this:
 
Love ya all and stay healthy,
Rolando Kissing heart


Re: To mask or not to mask, that is the question

jimmyjujames
 

 
Thank you for the mask link.
Funny and makes a point.
 
I sent it to 19 family and friends.
Took a screen shot of hit count and 30 minutes later it had increased 9,000 hits.
It's going viral on the virus.

Thanks
Jimmy
Think Again!
 


Re: Moving to a new imaging laptop #APCC

 

I'm about to do the same thing, so I'm watching this thread carefully.

Mojo

On 8/1/20 10:28 AM, Dean Jacobsen wrote:
I am moving to a new imaging laptop in a couple of days and will be installing APCC Pro, ASCOM 6.4 and the AP ASCOM driver on it.

I found the hidden C:\ProgramData\Astro-Physics\APCC\ directory.

I wanted to move as many of the existing settings over to the new computer as possible so I don't have to go through and set everything up again.

I do a new model every time I set up so I don't think that I need to move the "Models"

So, this is what I think I should move from the C:\ProgramData\Astro-Physics\APCC\ directory:

- the HRZ file that is my horizon limits on the current computer,
- the two MLM meridian limits files that I created.  I assume that the default MLM file will be in the new installation already,
- the "Settings" document - replace the default document in the new installation with this one from my current computer.
- the same with the SiteList document

I don't think I need the "Backups", "Logs" and "Models" folders in my new installation.

Is there anything else that I need to transfer over to the new installation?

--
Dean Jacobsen
http://astrophoto.net/wp/
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 

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