Date   

Re: M33 from CalStar 2022

Bill Long
 

APP is a bit easier to use than PI, but does not have the full kit of power that PI does. APP is wonderful at Mosaics though, much easier to do in APP than PI. 


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Roland Christen via groups.io <chris1011@...>
Sent: Friday, September 23, 2022 12:11 PM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] M33 from CalStar 2022
 
Is there an advantage to this program versus Pix Insight? I haven't tried either one. My main processing path is to do what I can in MaximDL and then process further in Photoshop.

Rolando

-----Original Message-----
From: Arvind <base16@...>
To: main@ap-gto.groups.io
Sent: Fri, Sep 23, 2022 1:51 pm
Subject: Re: [ap-gto] M33 from CalStar 2022

Thanks Roland. I used Astro Pixel Processor for processing.

On Fri, Sep 23, 2022 at 11:07 AM Roland Christen via groups.io <chris1011=aol.com@groups.io> wrote:
Very nice processing. What software are you using to process the image?

Rolando

-----Original Message-----
From: Arvind <base16@...>
To: main@ap-gto.groups.io
Sent: Fri, Sep 23, 2022 1:02 pm
Subject: [ap-gto] M33 from CalStar 2022

Shot using 900GTO & FSQ106 at f/5 with 2400MC Pro OSC camera, imaged using ASIAIR & an iOS app.

Just shy of 3½ hours total, including an auto-meridian flip. Polar Alignment was less than a 1-arcmin, and guided using a 120mm guidescope. Guide settings were 600 for all values (Calib. step, Max RA & Dec duration) in ASIAIR.


Love this setup for portable multi-night imaging (I'm at a star party). Not a single sub lost out of the 100 subs from last night, and the image is not cropped, as well.

--
Roland Christen
Astro-Physics

--
Roland Christen
Astro-Physics


Re: M33 from CalStar 2022

Roland Christen
 

Is there an advantage to this program versus Pix Insight? I haven't tried either one. My main processing path is to do what I can in MaximDL and then process further in Photoshop.

Rolando

-----Original Message-----
From: Arvind <base16@...>
To: main@ap-gto.groups.io
Sent: Fri, Sep 23, 2022 1:51 pm
Subject: Re: [ap-gto] M33 from CalStar 2022

Thanks Roland. I used Astro Pixel Processor for processing.

On Fri, Sep 23, 2022 at 11:07 AM Roland Christen via groups.io <chris1011=aol.com@groups.io> wrote:
Very nice processing. What software are you using to process the image?

Rolando

-----Original Message-----
From: Arvind <base16@...>
To: main@ap-gto.groups.io
Sent: Fri, Sep 23, 2022 1:02 pm
Subject: [ap-gto] M33 from CalStar 2022

Shot using 900GTO & FSQ106 at f/5 with 2400MC Pro OSC camera, imaged using ASIAIR & an iOS app.

Just shy of 3½ hours total, including an auto-meridian flip. Polar Alignment was less than a 1-arcmin, and guided using a 120mm guidescope. Guide settings were 600 for all values (Calib. step, Max RA & Dec duration) in ASIAIR.


Love this setup for portable multi-night imaging (I'm at a star party). Not a single sub lost out of the 100 subs from last night, and the image is not cropped, as well.

--
Roland Christen
Astro-Physics

--
Roland Christen
Astro-Physics


Re: Elephant Trunk, AP1100AE as a sleep aide

Roland Christen
 

Some thoughts from the peanut gallery,

Although you may have clouds and rain, we here in the Midwest have both plus we are under the jet stream most of the time with lousy seeing. Last night as an example I was out testing scopes and software with seeing at an abysmal 3 arc sec FWHM with a scope that can produce 1.3 FWHM in good seeing.

So, having said that, your image is quite nice, and the RGB does add a bit of 3-D to it compared to a normal narrowband Hubble palette like this one that I took last year: https://www.astrobin.com/full/g0bpv3/C/

What struck me about yours was the extraordinary amount of time you spent shooting this object compared to mine: i.e. 42 hours of data versus 10 hrs. And you had the advantage of a new high-falutin' CMOS camera that's some 3 times faster than my lowly QSI 683 with the slooow 8300 Kodak chip. Interestingly, we both had very close to the same 0.4 degree field radius. Your chip also has nearly 4 times the area of my QSI 683. The 10" F6.3 can cover a full frame format of course, I just didn't have the camera at the time to image with it.

Sooo, I'm using a 10" F6.3 flat field Mak-astrograph, and I have always been wondering if it's the right thing to spend time making in production, seeing as the SCTs of this size are so cheap. Maybe an SCT with an F6.3 reducer would negate the need for this scope?

Rolando

-----Original Message-----
From: ap@... <ap@...>
To: main@ap-gto.groups.io
Sent: Fri, Sep 23, 2022 1:18 pm
Subject: [ap-gto] Elephant Trunk, AP1100AE as a sleep aide

I suggest that the AP1100AE be submitted to the FDA for approval as a sleep aide. 

I tend to wake up in the week hours when my system is imaging, and roll over and unlock the phone and RDP in to check how things are going.  Last couple of nights the PHD2 log, which pops up first, had the first digit of a 1. That is a definite incentive to just go back to sleep and let it keep doing what it is doing.  Better than Ambien.  Almost as good as Bourbon.  :) 

I'm in that period here in Florida where it rains too much but there are a few nights open with really still air, but the wind has not picked up as it does during the actual dry season. 

I did finally find enough nights in between rain to finish off the elephant trunk (here "finish" could be defined as "got tired of collecting data" moreso than "definitely got enough data" -- but let's not split hairs). 

This is at 2800mm in RGB + SHO (all rolled together).  It has 30s RGB stars, the color is more from broadband mixed with the narrow band, and all the detail is from 36 hours of narrow band data (vs only 5.9 of BB for color).  No luminance, just synthetic luminance from narrow band.  I went through a rainbow of color variations and settled here.

Criticism and suggestions welcomed.

Full size version: https://www.astrobin.com/85ed5q/0/

Linwood

PS. If you submit to the FDA, will Medicare then pay for the mounts? 


--
Roland Christen
Astro-Physics


Re: M33 from CalStar 2022

Arvind
 

Thanks Roland. I used Astro Pixel Processor for processing.


On Fri, Sep 23, 2022 at 11:07 AM Roland Christen via groups.io <chris1011=aol.com@groups.io> wrote:
Very nice processing. What software are you using to process the image?

Rolando

-----Original Message-----
From: Arvind <base16@...>
To: main@ap-gto.groups.io
Sent: Fri, Sep 23, 2022 1:02 pm
Subject: [ap-gto] M33 from CalStar 2022

Shot using 900GTO & FSQ106 at f/5 with 2400MC Pro OSC camera, imaged using ASIAIR & an iOS app.

Just shy of 3½ hours total, including an auto-meridian flip. Polar Alignment was less than a 1-arcmin, and guided using a 120mm guidescope. Guide settings were 600 for all values (Calib. step, Max RA & Dec duration) in ASIAIR.


Love this setup for portable multi-night imaging (I'm at a star party). Not a single sub lost out of the 100 subs from last night, and the image is not cropped, as well.

--
Roland Christen
Astro-Physics


Re: Elephant Trunk, AP1100AE as a sleep aide

Emilio J. Robau, P.E.
 

Linwood,

That is a fine image for a Florida summer.   Last night was actually quite nice.  This hurricane will usher in the change in weather.  I just hope it does not hit us.  Somewhat tired of Andres, Charlie, and Irma for sure.  Anyways, I am going to try tonight and should have tried last night.  The air was very still and the sky was reasonable.  However, I have to work to pay for my 1100 and in hopeful waiting for my 130 and 110.  Very nice image.  I am amazed you can get any photons at all.


Elephant Trunk, AP1100AE as a sleep aide

ap@CaptivePhotons.com
 

I suggest that the AP1100AE be submitted to the FDA for approval as a sleep aide. 

I tend to wake up in the week hours when my system is imaging, and roll over and unlock the phone and RDP in to check how things are going.  Last couple of nights the PHD2 log, which pops up first, had the first digit of a 1. That is a definite incentive to just go back to sleep and let it keep doing what it is doing.  Better than Ambien.  Almost as good as Bourbon.  :) 

I'm in that period here in Florida where it rains too much but there are a few nights open with really still air, but the wind has not picked up as it does during the actual dry season. 

I did finally find enough nights in between rain to finish off the elephant trunk (here "finish" could be defined as "got tired of collecting data" moreso than "definitely got enough data" -- but let's not split hairs). 

This is at 2800mm in RGB + SHO (all rolled together).  It has 30s RGB stars, the color is more from broadband mixed with the narrow band, and all the detail is from 36 hours of narrow band data (vs only 5.9 of BB for color).  No luminance, just synthetic luminance from narrow band.  I went through a rainbow of color variations and settled here.

Criticism and suggestions welcomed.

Full size version: https://www.astrobin.com/85ed5q/0/

Linwood

PS. If you submit to the FDA, will Medicare then pay for the mounts? 


Re: M33 from CalStar 2022

Roland Christen
 

Very nice processing. What software are you using to process the image?

Rolando

-----Original Message-----
From: Arvind <base16@...>
To: main@ap-gto.groups.io
Sent: Fri, Sep 23, 2022 1:02 pm
Subject: [ap-gto] M33 from CalStar 2022

Shot using 900GTO & FSQ106 at f/5 with 2400MC Pro OSC camera, imaged using ASIAIR & an iOS app.

Just shy of 3½ hours total, including an auto-meridian flip. Polar Alignment was less than a 1-arcmin, and guided using a 120mm guidescope. Guide settings were 600 for all values (Calib. step, Max RA & Dec duration) in ASIAIR.


Love this setup for portable multi-night imaging (I'm at a star party). Not a single sub lost out of the 100 subs from last night, and the image is not cropped, as well.

--
Roland Christen
Astro-Physics


M33 from CalStar 2022

Arvind
 

Shot using 900GTO & FSQ106 at f/5 with 2400MC Pro OSC camera, imaged using ASIAIR & an iOS app.

Just shy of 3½ hours total, including an auto-meridian flip. Polar Alignment was less than a 1-arcmin, and guided using a 120mm guidescope. Guide settings were 600 for all values (Calib. step, Max RA & Dec duration) in ASIAIR.


Love this setup for portable multi-night imaging (I'm at a star party). Not a single sub lost out of the 100 subs from last night, and the image is not cropped, as well.


Re: Elongated Stars Following Merdian Flip

Roland Christen
 


Everything works fine except for the first 5-minute frame following meridian flip, which is showing elongated stars.  Then, things settle down for the rest of the session. 
If the guiding is normal then the mount is doing what the guide program is telling it to do. The mount cannot know what the imaging scope is doing. The imaging scope may be flexing when pointing straight up after the flip. As long as the guiding is correct and accurate, that's all that the mount can do - it cannot compensate for differential flexure between imaging scope and guide scope.

The most accurate way to guide is with an off-axis guider. That way any flexure in the imaging scope is automatically resolved by the guiding software. You can never expect that a separate guide scope will eliminate errors of flexure in an imaging scope, no matter how well you think that things are connected. And this is especially true when the guide scope is connected to the rings instead of hard fixed to the focuser of the imaging scope.

Roland Christen
Astro-Physics


-----Original Message-----
From: Bruce Donzanti <donza2735@...>
To: main@ap-gto.groups.io
Sent: Fri, Sep 23, 2022 8:19 am
Subject: [ap-gto] Elongated Stars Following Merdian Flip

I recently replaced my Stellarvue with a Takahashi FSQ-85 EDX on top of my C11" EdgeHD.  The mount is an AP1100.  I've have used this setup the past 2 years with NINA with issues until I replaced the Stellarvue with the Tak.  Everything works fine except for the first 5-minute frame following meridian flip, which is showing elongated stars.  Then, things settle down for the rest of the session.  All screws are tight, scope is well-balanced, cables are managed through the mount with no snags, and I cannot find any loose parts. I use an Optec ThirdLynx auto-motor focuser on the Tak, similar to the one that I used on the Stellarvue.  I've heard stories in the past of the Tak focuser slipping but the Optec autofocuser has it locked in place.  I have not had time (weather-related) to test the C11 to see if it will start doing the same thing.  I do not think it is a mount issue but I am asking here just in case someone else has experienced this and what the potential causes could be.  I guess if the C11 now starts doing this, it could be a mount problem, but I find it suspicious that it only started happening when I swapped the scopes (along with the dovetail plate and support rings).  I've attached a couple of pics of the setup but they may not help much.  

Any thoughts would be appreciated.

Bruce

--
Roland Christen
Astro-Physics


Re: Mach2 and Star Trails #Mach2GTO

Roland Christen
 

That's really neat!

Roland

-----Original Message-----
From: David Johnson <dajohns37@...>
To: main@ap-gto.groups.io
Sent: Fri, Sep 23, 2022 7:25 am
Subject: [ap-gto] Mach2 and Star Trails #Mach2GTO

Slightly different kind of video of Mach2 in action available here.

--
Roland Christen
Astro-Physics


Re: Elongated Stars Following Merdian Flip

Terry Martin
 

Hi Bruce,

Are you using the Smart Meridian Flip plug-in in NINA?  If not, you should.  I've seen the same issue in NINA when not using the plug-in as NINA will initiate the flip when it is time whether your in the middle of an exposure or not.  Using the plug in will eliminate the issue.  

Now, I'm not saying that differential flexure is not an issue as well, with that mountain of stuff on top of your C11, but if you're not seeing any issues beyond the time of the meridian flip, then try the plug-in.

~Terry


Re: M33 from Paris (AP900 + 8" f/4 Newtonian)

Dan_Paris
 

Thanks Luca for this interesting read!

Here is my H-alpha layer (not using a 6-meter telescope though): http://www.astrosurf.com/uploads/monthly_2022_09/M33halpha.jpg.db2fb8942411fb3ee5c9c2f4a80bb708.jpg

best regards,

Dan


Re: Elongated Stars Following Merdian Flip

Kent Kirkley
 

I use an SBIG STL-11000 full frame camera with the SBIG Remote Guide Head camera.
The actual 'guidescope' is a 100mm focal length optic that SBIG once sold, which name I can't remember at the moment. It screws into the Remote Guide Head. So this 100mm fl guidescope guides the AP155, 1000mm fl with no problem. Now the SBIG STL-11000 system in now old but
there are any number of short focal length optics that can be used, even old, manual focus 100mm camera lenses mounted to a guide camera, light weight and cheap. It's just a matter of figuring out how to put it together.
Kent

On Friday, September 23, 2022, 10:05:48 AM CDT, Bruce Donzanti <donza2735@...> wrote:


What guide scope did you use? 


Re: Elongated Stars Following Merdian Flip

Bruce Donzanti
 

What guide scope did you use? 


Re: Elongated Stars Following Merdian Flip

Kent Kirkley
 

Guiding the short focal length TAK with the very long focal length C11 can still be effected by flexure, it just may not show up. That might be OK, but, as you probably know finding a guide star with an OAG isn't always easy, although with the much wider field of the TAK there are more suitable stars available.
In my AP155 elongated star issue I got rid of the longish focal length guidscope and stated using a very lightweight, short focal length guidscope attached directly to the 155's rear tube.
With today's guide cameras long focal length guidscopes aren't necessary.
Kent

On Friday, September 23, 2022, 9:14:14 AM CDT, Bruce Donzanti <donza2735@...> wrote:


Then that argues going back to me using the OAG on the C11, which always worked well, even better than the guide scope on the Stellarvue.  Actually, the guide scope on the Tak is a backup in case the OAG does not play nice on certain nights.  This was only my second night testing it.  If the OAG on the C11 works as it has in the past, problem solved.


Re: Please make APCC stop creating virtual ports when set to "none"

ap@CaptivePhotons.com
 

On Fri, Sep 23, 2022 at 08:49 AM, Ray Gralak wrote:
Would you consider making APCC really honor the "None" setting?
That's already been done (and more :-) but we are still testing and documenting the changes in the next APCC point release.
That's terrific, thank you.  It's manageable as is, clearly, just annoying.  Glad to hear you are ahead of me!

Linwood


Re: Elongated Stars Following Merdian Flip

Bruce Donzanti
 

Then that argues going back to me using the OAG on the C11, which always worked well, even better than the guide scope on the Stellarvue.  Actually, the guide scope on the Tak is a backup in case the OAG does not play nice on certain nights.  This was only my second night testing it.  If the OAG on the C11 works as it has in the past, problem solved.


Re: Elongated Stars Following Merdian Flip

Kent Kirkley
 

Ok, I see people stacking all kinds of optical tubes on top of each other. This is just asking for flexure. I had an AP155 with a guidescope on top mounted in rings and kept having elongated stars. "Mr. AP" suggested using a lightweight guidescope attached directly to the 155's tube, not with plates or rings. I redid my guidescope arrangement to reflect this and elongated stars stopped happening.
Kent Kirkley


On Sep 23, 2022, at 8:46 AM, Bruce Donzanti <donza2735@...> wrote:

No- it is being used as an imaging scope.  I can guide using the guide scope attached to it or the OAG on the C11.  It is no heavier than the Stellarvue.  It could be some new flexure introduced by the Tak that I can't seem to identify yet. 

Thanks 


Re: Elongated Stars Following Merdian Flip

Bruce Donzanti
 

No- it is being used as an imaging scope.  I can guide using the guide scope attached to it or the OAG on the C11.  It is no heavier than the Stellarvue.  It could be some new flexure introduced by the Tak that I can't seem to identify yet. 

Thanks 


Re: Elongated Stars Following Merdian Flip

Kent Kirkley
 

I doubt a mount problem. More than likely differential flexure. Are you using the Tak as a guidescope? Tak instruments are heavy and even if hardware attachment devices are seemingly beefy and secure, things can move. The felt inside rings can allow movement. 


On Sep 23, 2022, at 8:23 AM, Cheng-Yang Tan via groups.io <cytan299@...> wrote:


I'd suggest looking at the camera angle rotator CAA. My CAA on my FSQ106 was slipping even though I thought I had really tightened it down. I replaced the entire focuser mechanism with a NiteCrawler and have had no problems ever since.

cytan

On Friday, September 23, 2022 at 08:19:35 AM CDT, Bruce Donzanti <donza2735@...> wrote:


I recently replaced my Stellarvue with a Takahashi FSQ-85 EDX on top of my C11" EdgeHD.  The mount is an AP1100.  I've have used this setup the past 2 years with NINA with issues until I replaced the Stellarvue with the Tak.  Everything works fine except for the first 5-minute frame following meridian flip, which is showing elongated stars.  Then, things settle down for the rest of the session.  All screws are tight, scope is well-balanced, cables are managed through the mount with no snags, and I cannot find any loose parts. I use an Optec ThirdLynx auto-motor focuser on the Tak, similar to the one that I used on the Stellarvue.  I've heard stories in the past of the Tak focuser slipping but the Optec autofocuser has it locked in place.  I have not had time (weather-related) to test the C11 to see if it will start doing the same thing.  I do not think it is a mount issue but I am asking here just in case someone else has experienced this and what the potential causes could be.  I guess if the C11 now starts doing this, it could be a mount problem, but I find it suspicious that it only started happening when I swapped the scopes (along with the dovetail plate and support rings).  I've attached a couple of pics of the setup but they may not help much.  

Any thoughts would be appreciated.

Bruce