Date   

Re: Can't connect to mount

CurtisC
 
Edited

Well, Woody, this issue would be a motivation to spring for CP4.  Funny thing, my Keyspan appeared to crash back in January, and I bought the FTDI in desperation to replace it.  So now the FTDI doesn't work, and the Keyspan has saved me.


Re: C11HD on Mach2 #Mach2GTO

Michael Dolenga
 

Nice shots Dominique. I especially like M13, always a favorite of mine. Your photo reminds me of the time I looked at it through at 20+ inch Dobsonian, really amazing.

Michael



On Tuesday, July 21, 2020, 01:25:54 PM PDT, Dominique Durand via groups.io <dom33.durand@...> wrote:


[Edited Message Follows]

Hi,
Here is a little feedback on the use of my Mach2.
The modeling goes pretty well with SGP / Platesolve2.
After photoshoots with the AP130GT, I switched to the C11HD with still use without autoguiding. With 1960 focal length with the reducer or 2800 focal length without the reducer, the quality of monitoring must be up to par.
Here are 2 clusters M13 and M92 made with exposures of 60 seconds and a galaxy NGC6384 made with exposures of 180 seconds.
The problems to be solved are more at the level of C11 than Mach2.
M13
https://astrob.in/full/h1sgqo/0/

M92
https://astrob.in/full/vfeboh/0/

NGC6384
https://astrob.in/full/5c5wt2/F/

Happy amateur astronut
Dominique


Re: Mount coordinates change while autoguiding

Michael Dolenga
 

DOH! I completely forgot about the collimation screws. I installed it in the mount ages ago and it's been there ever since. 

That said, given that I usually shoot from either my lumpy, mole infested backyard or remotely, guaranteeing good levelling isn't always the case. The extra validation from Sharpcap is helpful.

Michael


On Tuesday, July 21, 2020, 11:49:57 AM PDT, uncarollo2 <chris1011@...> wrote:



Back in RAPAS, Polaris was noticeably out of place.
Yes, and then you adjust the RAPAS via the 3 collimation screws to put Polaris where it should be, and then you have a RAPAS that can recreate that perfect polar alignment in about 10 seconds next time you set up. That's the whole idea about the collimation screws on the RAPAS.

Rolando


-----Original Message-----
From: Michael Dolenga via groups.io <giroditalia@...>
To: main@ap-gto.groups.io
Sent: Tue, Jul 21, 2020 1:44 pm
Subject: Re: [ap-gto] Mount coordinates change while autoguiding

I got the Polemaster camera, and used it with SharpCap. After careful alignment with the RAPAS, sharpcap reported an error of about 5 arcminutes, which it categorizes as "poor." A few minutes with the app and it was down to 11 arc seconds error. Back in RAPAS, Polaris was noticeably out of place. The imaging session I did last night showed at most 5 arc seconds of drift per hour over a 4 hour period, so clearly there was an improvement, although that's anecdotal at best. And I don't see any improvement on the images, I think we're seeing limited here in Seattle. Actually, cloud limited. :)

Michael



On Saturday, July 18, 2020, 09:39:18 AM PDT, uncarollo2 <chris1011@...> wrote:



Btw, is a 1 minute DEC drift over 1 hour at a declination of about 40 degrees good/bad?
The mount itself doesn't move in Dec, so all drift is due to external errors (atmospheric refraction, differential flexure, polar misalignment). Most Dec drift is simple polar misalignment in azimuth when pointing overhead and altitude misalignment when pointing towards the east or west.

Is 1 minute drift good/bad - I think that's bordering on excessive and can be easily fixed using PEMPro drift alignment. Good alignment back in the "good ol' days" was 1 arc sec drift per 5 minutes. That's back in my day when we used to walk uphill to school thru 5 foot snow drifts, and uphill again home.

Rolando


-----Original Message-----
From: Michael Dolenga via groups.io <giroditalia@...>
To: main@ap-gto.groups.io
Sent: Sat, Jul 18, 2020 11:27 am
Subject: Re: [ap-gto] Mount coordinates change while autoguiding

You do need to recalibrate after flipping to account for orthogonality errors. And you'd have to slew to the same coordinates reported by the mount just before you flip, which differ from the target. It's not really an issue once you understand what is happening, and luckily the software I'm using, NINA, does a plate solve after flipping and re-slews, if necessary, to your original target coordinates which it has preserved. I raise the question because until I understood how NINA worked, I thought the drift on the mount was problematic.

When I was doing flips manually, I would calibrate before flipping to reset the mount's coordinates to match my target, as Ray suggested.

Btw, is a 1 minute DEC drift over 1 hour at a declination of about 40 degrees good/bad? 1850 mm scope. Polar aligned using RAPAS.


Michael



On Saturday, July 18, 2020, 09:06:43 AM PDT, uncarollo2 <chris1011@...> via groups.io <chris1011@...> wrote:



The meridian flip automation i use includes a re-centering of the target via plate solve, which I think is pretty common
When you are autoguiding the target is always centered so no plate solve is needed. Because of the guide commands, the internal co-ordinates slowly drift, so at the end of the session you simply do a recal which brings the actual and commanded co-ordinates back together.

Rolando


-----Original Message-----
From: Brian Valente <bvalente@...>
To: main@ap-gto.groups.io
Sent: Sat, Jul 18, 2020 10:52 am
Subject: Re: [ap-gto] Mount coordinates change while autoguiding

>>> If I leave the mount running with no autoguider connected at all, RA and DEC remain constant, as I would expect. 

But likely the fov would have change significantly, so your target would have drifted out of frame

 >>>This confounds automated meridian flips because the mount "thinks" it is pointed somewhere other than where it actually is. Often, the difference is too slight to be significance, but sometimes not. 

The meridian flip automation i use includes a re-centering of the target via plate solve, which I think is pretty common


Brian


On Sat, Jul 18, 2020 at 8:48 AM uncarollo2 <chris1011@...> via groups.io <chris1011=aol.com@groups.io> wrote:

It seems as though the autoguider commands are being interpreted as user initiated slews.
Yes, autoguider commands are essentially user initiated moves which cause the mount to go to a new coordinate every time a move command is issued. This is universal and applies to every mount ever made, whether AP mount or other brands. They will all do the same.

Rolando


-----Original Message-----
From: Michael Dolenga via groups.io <giroditalia=yahoo.com@groups.io>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Sat, Jul 18, 2020 9:31 am
Subject: [ap-gto] Mount coordinates change while autoguiding

I've noticed that my 900GTO's coordinates, as reported by ASCOM (latest version of the driver) change over a session where I am autoguiding. This occurs whether using MaximDL or NINA/PhD. In both cases, I am configured to send autoguider commands via the ASCOM driver rather than a separate ST4 cable.

This confounds automated meridian flips because the mount "thinks" it is pointed somewhere other than where it actually is. Often, the difference is too slight to be significance, but sometimes not. 

As an example, last night I was doing 30 minute shots of the Crescent Nebula. Over one hour, as reported by the RA/DEC fields written into the FITS header, I saw a difference of 6 minutes, 4 seconds in RA and 1 minute 7 seconds in DEC.

If I leave the mount running with no autoguider connected at all, RA and DEC remain constant, as I would expect.

Is this expected behavior or am I possibly missing some configuration option? It seems as though the autoguider commands are being interpreted as user initiated slews.


Michael


--
Brian 



Brian Valente


Re: More unguided images with the Mach2 and APCC Pro #APCC #Mach2GTO

Roland Christen
 

That combination of scope and mount is doing an amazing job.

Rolando



-----Original Message-----
From: Dean Jacobsen <deanjacobsen@...>
To: main@ap-gto.groups.io
Sent: Tue, Jul 21, 2020 2:52 pm
Subject: [ap-gto] More unguided images with the Mach2 and APCC Pro #Mach2GTO #APCC

Hi All,

I have myself back into the unguided imaging grove with the Mach2.  Unless I mis-configure my Sequence Generator Pro/PlateSolve2 profile again.  ;-)

I couldn't be happier with the Mach2 and the software package.  I have been using AP mounts for a long time and this mount/software package is the best by far.

I set up the mount and break it down for each session so, instead of doing an all sky APPM point map run I have just been doing a 3 line point map that covers the declination of the object for the night.  For instance, if the object is at +20 declination I will set up APPM to map 10 points along each of +25, +20, and +15 declination.  This turns out to be about 33 or 34 points taking into account the double mapping of points within the west side meridian limits I have set up.  It takes about 20 to 30 minutes depending on how PlateSolve2 feels that night.

I suspect that I am taking more points than I need to but I want to make sure that the night is not wasted so I err on the side of caution.

Here are a couple of links to unguided images from the last two sessions:

https://www.astrobin.com/a5vp4q/

and

https://www.astrobin.com/h3kenj/

The good folks at AP have really done a nice job with the Mach2.

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


Re: More unguided images with the Mach2 and APCC Pro #APCC #Mach2GTO

Stuart <stuart.j.heggie@...>
 

Dean, both are very nice shots but "The Coathanger" aka Brocchi's Cluster is my favourite.


On Tue, 21 Jul 2020 at 15:52, Dean Jacobsen <deanjacobsen@...> wrote:
Hi All,

I have myself back into the unguided imaging grove with the Mach2.  Unless I mis-configure my Sequence Generator Pro/PlateSolve2 profile again.  ;-)

I couldn't be happier with the Mach2 and the software package.  I have been using AP mounts for a long time and this mount/software package is the best by far.

I set up the mount and break it down for each session so, instead of doing an all sky APPM point map run I have just been doing a 3 line point map that covers the declination of the object for the night.  For instance, if the object is at +20 declination I will set up APPM to map 10 points along each of +25, +20, and +15 declination.  This turns out to be about 33 or 34 points taking into account the double mapping of points within the west side meridian limits I have set up.  It takes about 20 to 30 minutes depending on how PlateSolve2 feels that night.

I suspect that I am taking more points than I need to but I want to make sure that the night is not wasted so I err on the side of caution.

Here are a couple of links to unguided images from the last two sessions:

https://www.astrobin.com/a5vp4q/

and

https://www.astrobin.com/h3kenj/

The good folks at AP have really done a nice job with the Mach2.

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


--

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


More unguided images with the Mach2 and APCC Pro #APCC #Mach2GTO

Dean Jacobsen
 

Hi All,

I have myself back into the unguided imaging grove with the Mach2.  Unless I mis-configure my Sequence Generator Pro/PlateSolve2 profile again.  ;-)

I couldn't be happier with the Mach2 and the software package.  I have been using AP mounts for a long time and this mount/software package is the best by far.

I set up the mount and break it down for each session so, instead of doing an all sky APPM point map run I have just been doing a 3 line point map that covers the declination of the object for the night.  For instance, if the object is at +20 declination I will set up APPM to map 10 points along each of +25, +20, and +15 declination.  This turns out to be about 33 or 34 points taking into account the double mapping of points within the west side meridian limits I have set up.  It takes about 20 to 30 minutes depending on how PlateSolve2 feels that night.

I suspect that I am taking more points than I need to but I want to make sure that the night is not wasted so I err on the side of caution.

Here are a couple of links to unguided images from the last two sessions:

https://www.astrobin.com/a5vp4q/

and

https://www.astrobin.com/h3kenj/

The good folks at AP have really done a nice job with the Mach2.

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


Re: Mach2 Keypad

 

Dean,

 

The Mach2 fits into the ADATRI, so  it sounds like you are all set.

 

Clear Skies,

 

Marj Christen

Astro-Physics, Inc

11250 Forest Hills Rd

Machesney Park, IL 61115

Phone: 815-282-1513

Fax: 815-282-9847

www.astro-physics.com

 

From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Dean Jacobsen
Sent: Tuesday, July 21, 2020 12:33 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Mach2 Keypad

 

On Mon, Jul 20, 2020 at 05:25 PM, Michael Dolenga wrote:

Another question, is the Mach 2 base the same as a 2011 series 900GTO base? Basically, can I use the same tripod?

Michael, my standard 900 mounting plate already had the three bolt pattern for the ADATRI tripod adapter.  It was just a matter of bolting the ADATRI onto my existing 900 plate.
 
--
Dean Jacobsen
http://astrophoto.net/wp/
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 


Re: Mach1 and GTOCP4 Yellow Light

Mikko Viljamaa
 

Here's the link for the video; https://drive.google.com/file/d/1XaoLKrcg-IDLt4CfK7N3HrpyfOaboHlg/view?usp=sharing

I haven't heard yet if I should send the Mount back to AP or if this is something I can try to fix myself.


- Mikko


Re: Tracking w/ Passil 4 polar alignment

Christopher Erickson
 

And for FWIW, I have a big, heavy/1.5kg+ (and sharp!) Nikkor 80-400mm AF-S ED zoom lens and if I want to try to image the sky with it, I have to add a Losmandy DVR108 Guide Scope ring to the plate, near the front end of the lens to keep it rigid and stable. The thing will sag/flex/shift quite a bit under its own weight when mounted on it's integral tripod shoe. I assume there are a lot of floating parts inside of that big zoom lens, fighting gravity. If I am using two or more cams on a long plate, I have the telephoto set up rigidly with a secondary lens support and the cams with shorter lenses go on ball heads on the plate. Most ball-heads have a lot of flex so I only put 58mm or shorter lenses on them. My favorite lenses for the second and third cams are 20mm ultra-wide and a 10mm fisheye.

I hope this helps.

Virus-free. www.avg.com


On Tue, Jul 21, 2020 at 8:27 AM uncarollo2 <chris1011@...> via groups.io <chris1011=aol.com@groups.io> wrote:
Even if the polar alignment is spot on you will need to use a PEM curve.  I'm guessing here because you did not provide enough information to go on. For instance, what direction did the trailing go, where in the sky did you image. There is no information on how the scope is being held, or the camera, or whether there is focuser sag. Lots of things can add up to give poor results.

Rolando



-----Original Message-----
From: Wiggins, Rick <rickwiggins@...>
To: main@ap-gto.groups.io
Sent: Tue, Jul 21, 2020 12:58 pm
Subject: Re: [ap-gto] Tracking w/ Passil 4 polar alignment

Hi Roland,
I did setup using the pasill4 polar scope and got good alignment on the two stars through the polar scope. I did not use a PE curve. Do you think slight smearing in 25 secs given that rough setup is reasonable or should it be better?
Thanks, Rick


Re: Mount coordinates change while autoguiding

Roland Christen
 


Back in RAPAS, Polaris was noticeably out of place.
Yes, and then you adjust the RAPAS via the 3 collimation screws to put Polaris where it should be, and then you have a RAPAS that can recreate that perfect polar alignment in about 10 seconds next time you set up. That's the whole idea about the collimation screws on the RAPAS.

Rolando


-----Original Message-----
From: Michael Dolenga via groups.io <giroditalia@...>
To: main@ap-gto.groups.io
Sent: Tue, Jul 21, 2020 1:44 pm
Subject: Re: [ap-gto] Mount coordinates change while autoguiding

I got the Polemaster camera, and used it with SharpCap. After careful alignment with the RAPAS, sharpcap reported an error of about 5 arcminutes, which it categorizes as "poor." A few minutes with the app and it was down to 11 arc seconds error. Back in RAPAS, Polaris was noticeably out of place. The imaging session I did last night showed at most 5 arc seconds of drift per hour over a 4 hour period, so clearly there was an improvement, although that's anecdotal at best. And I don't see any improvement on the images, I think we're seeing limited here in Seattle. Actually, cloud limited. :)

Michael



On Saturday, July 18, 2020, 09:39:18 AM PDT, uncarollo2 <chris1011@...> wrote:



Btw, is a 1 minute DEC drift over 1 hour at a declination of about 40 degrees good/bad?
The mount itself doesn't move in Dec, so all drift is due to external errors (atmospheric refraction, differential flexure, polar misalignment). Most Dec drift is simple polar misalignment in azimuth when pointing overhead and altitude misalignment when pointing towards the east or west.

Is 1 minute drift good/bad - I think that's bordering on excessive and can be easily fixed using PEMPro drift alignment. Good alignment back in the "good ol' days" was 1 arc sec drift per 5 minutes. That's back in my day when we used to walk uphill to school thru 5 foot snow drifts, and uphill again home.

Rolando


-----Original Message-----
From: Michael Dolenga via groups.io <giroditalia@...>
To: main@ap-gto.groups.io
Sent: Sat, Jul 18, 2020 11:27 am
Subject: Re: [ap-gto] Mount coordinates change while autoguiding

You do need to recalibrate after flipping to account for orthogonality errors. And you'd have to slew to the same coordinates reported by the mount just before you flip, which differ from the target. It's not really an issue once you understand what is happening, and luckily the software I'm using, NINA, does a plate solve after flipping and re-slews, if necessary, to your original target coordinates which it has preserved. I raise the question because until I understood how NINA worked, I thought the drift on the mount was problematic.

When I was doing flips manually, I would calibrate before flipping to reset the mount's coordinates to match my target, as Ray suggested.

Btw, is a 1 minute DEC drift over 1 hour at a declination of about 40 degrees good/bad? 1850 mm scope. Polar aligned using RAPAS.


Michael



On Saturday, July 18, 2020, 09:06:43 AM PDT, uncarollo2 <chris1011@...> via groups.io <chris1011@...> wrote:



The meridian flip automation i use includes a re-centering of the target via plate solve, which I think is pretty common
When you are autoguiding the target is always centered so no plate solve is needed. Because of the guide commands, the internal co-ordinates slowly drift, so at the end of the session you simply do a recal which brings the actual and commanded co-ordinates back together.

Rolando


-----Original Message-----
From: Brian Valente <bvalente@...>
To: main@ap-gto.groups.io
Sent: Sat, Jul 18, 2020 10:52 am
Subject: Re: [ap-gto] Mount coordinates change while autoguiding

>>> If I leave the mount running with no autoguider connected at all, RA and DEC remain constant, as I would expect. 

But likely the fov would have change significantly, so your target would have drifted out of frame

 >>>This confounds automated meridian flips because the mount "thinks" it is pointed somewhere other than where it actually is. Often, the difference is too slight to be significance, but sometimes not. 

The meridian flip automation i use includes a re-centering of the target via plate solve, which I think is pretty common


Brian


On Sat, Jul 18, 2020 at 8:48 AM uncarollo2 <chris1011@...> via groups.io <chris1011=aol.com@groups.io> wrote:

It seems as though the autoguider commands are being interpreted as user initiated slews.
Yes, autoguider commands are essentially user initiated moves which cause the mount to go to a new coordinate every time a move command is issued. This is universal and applies to every mount ever made, whether AP mount or other brands. They will all do the same.

Rolando


-----Original Message-----
From: Michael Dolenga via groups.io <giroditalia=yahoo.com@groups.io>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Sat, Jul 18, 2020 9:31 am
Subject: [ap-gto] Mount coordinates change while autoguiding

I've noticed that my 900GTO's coordinates, as reported by ASCOM (latest version of the driver) change over a session where I am autoguiding. This occurs whether using MaximDL or NINA/PhD. In both cases, I am configured to send autoguider commands via the ASCOM driver rather than a separate ST4 cable.

This confounds automated meridian flips because the mount "thinks" it is pointed somewhere other than where it actually is. Often, the difference is too slight to be significance, but sometimes not. 

As an example, last night I was doing 30 minute shots of the Crescent Nebula. Over one hour, as reported by the RA/DEC fields written into the FITS header, I saw a difference of 6 minutes, 4 seconds in RA and 1 minute 7 seconds in DEC.

If I leave the mount running with no autoguider connected at all, RA and DEC remain constant, as I would expect.

Is this expected behavior or am I possibly missing some configuration option? It seems as though the autoguider commands are being interpreted as user initiated slews.


Michael


--
Brian 



Brian Valente


Re: NGC6960

Stuart <stuart.j.heggie@...>
 

Nice work Mike! Big target - you did well to squeeze it in!


On Tue, 21 Jul 2020 at 13:45, Mike Dodd <mike@...> wrote:
I've long been attracted to the Veil Nebula, but never could image
NGC6960, The Witch's Broom, because my old ST-8 CCD camera bloomed the
bright star. But my current ASI1600MCP one-shot color CMOS camera
doesn't bloom, so now this target is in play.

Recently I managed to acquire nearly 5 hours of data over three rare
clear nights, and hope to get another 3-4 hours when the sky clears
again. Here's what I have so far:
<http://astronomy.mdodd.com/nebulae-17.html>

I rotated the camera to capture as much of the "broom" as possible on
the sensor, corner-to-corner. I never knew there was so much faint H-a
nebulosity close-by. Maybe additional data will reveal more.

Comments and suggestions welcome.

TMB-130SS APO @ f/7 on an AP1200.

--- Mike
http://astronomy.mdodd.com





--

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


Re: Mount coordinates change while autoguiding

Michael Dolenga
 

I got the Polemaster camera, and used it with SharpCap. After careful alignment with the RAPAS, sharpcap reported an error of about 5 arcminutes, which it categorizes as "poor." A few minutes with the app and it was down to 11 arc seconds error. Back in RAPAS, Polaris was noticeably out of place. The imaging session I did last night showed at most 5 arc seconds of drift per hour over a 4 hour period, so clearly there was an improvement, although that's anecdotal at best. And I don't see any improvement on the images, I think we're seeing limited here in Seattle. Actually, cloud limited. :)

Michael



On Saturday, July 18, 2020, 09:39:18 AM PDT, uncarollo2 <chris1011@...> wrote:



Btw, is a 1 minute DEC drift over 1 hour at a declination of about 40 degrees good/bad?
The mount itself doesn't move in Dec, so all drift is due to external errors (atmospheric refraction, differential flexure, polar misalignment). Most Dec drift is simple polar misalignment in azimuth when pointing overhead and altitude misalignment when pointing towards the east or west.

Is 1 minute drift good/bad - I think that's bordering on excessive and can be easily fixed using PEMPro drift alignment. Good alignment back in the "good ol' days" was 1 arc sec drift per 5 minutes. That's back in my day when we used to walk uphill to school thru 5 foot snow drifts, and uphill again home.

Rolando


-----Original Message-----
From: Michael Dolenga via groups.io <giroditalia@...>
To: main@ap-gto.groups.io
Sent: Sat, Jul 18, 2020 11:27 am
Subject: Re: [ap-gto] Mount coordinates change while autoguiding

You do need to recalibrate after flipping to account for orthogonality errors. And you'd have to slew to the same coordinates reported by the mount just before you flip, which differ from the target. It's not really an issue once you understand what is happening, and luckily the software I'm using, NINA, does a plate solve after flipping and re-slews, if necessary, to your original target coordinates which it has preserved. I raise the question because until I understood how NINA worked, I thought the drift on the mount was problematic.

When I was doing flips manually, I would calibrate before flipping to reset the mount's coordinates to match my target, as Ray suggested.

Btw, is a 1 minute DEC drift over 1 hour at a declination of about 40 degrees good/bad? 1850 mm scope. Polar aligned using RAPAS.


Michael



On Saturday, July 18, 2020, 09:06:43 AM PDT, uncarollo2 <chris1011@...> via groups.io <chris1011@...> wrote:



The meridian flip automation i use includes a re-centering of the target via plate solve, which I think is pretty common
When you are autoguiding the target is always centered so no plate solve is needed. Because of the guide commands, the internal co-ordinates slowly drift, so at the end of the session you simply do a recal which brings the actual and commanded co-ordinates back together.

Rolando


-----Original Message-----
From: Brian Valente <bvalente@...>
To: main@ap-gto.groups.io
Sent: Sat, Jul 18, 2020 10:52 am
Subject: Re: [ap-gto] Mount coordinates change while autoguiding

>>> If I leave the mount running with no autoguider connected at all, RA and DEC remain constant, as I would expect. 

But likely the fov would have change significantly, so your target would have drifted out of frame

 >>>This confounds automated meridian flips because the mount "thinks" it is pointed somewhere other than where it actually is. Often, the difference is too slight to be significance, but sometimes not. 

The meridian flip automation i use includes a re-centering of the target via plate solve, which I think is pretty common


Brian


On Sat, Jul 18, 2020 at 8:48 AM uncarollo2 <chris1011@...> via groups.io <chris1011=aol.com@groups.io> wrote:

It seems as though the autoguider commands are being interpreted as user initiated slews.
Yes, autoguider commands are essentially user initiated moves which cause the mount to go to a new coordinate every time a move command is issued. This is universal and applies to every mount ever made, whether AP mount or other brands. They will all do the same.

Rolando


-----Original Message-----
From: Michael Dolenga via groups.io <giroditalia=yahoo.com@groups.io>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Sat, Jul 18, 2020 9:31 am
Subject: [ap-gto] Mount coordinates change while autoguiding

I've noticed that my 900GTO's coordinates, as reported by ASCOM (latest version of the driver) change over a session where I am autoguiding. This occurs whether using MaximDL or NINA/PhD. In both cases, I am configured to send autoguider commands via the ASCOM driver rather than a separate ST4 cable.

This confounds automated meridian flips because the mount "thinks" it is pointed somewhere other than where it actually is. Often, the difference is too slight to be significance, but sometimes not. 

As an example, last night I was doing 30 minute shots of the Crescent Nebula. Over one hour, as reported by the RA/DEC fields written into the FITS header, I saw a difference of 6 minutes, 4 seconds in RA and 1 minute 7 seconds in DEC.

If I leave the mount running with no autoguider connected at all, RA and DEC remain constant, as I would expect.

Is this expected behavior or am I possibly missing some configuration option? It seems as though the autoguider commands are being interpreted as user initiated slews.


Michael


--
Brian 



Brian Valente


Re: Tracking w/ Passil 4 polar alignment

Roland Christen
 

Even if the polar alignment is spot on you will need to use a PEM curve.  I'm guessing here because you did not provide enough information to go on. For instance, what direction did the trailing go, where in the sky did you image. There is no information on how the scope is being held, or the camera, or whether there is focuser sag. Lots of things can add up to give poor results.

Rolando



-----Original Message-----
From: Wiggins, Rick <rickwiggins@...>
To: main@ap-gto.groups.io
Sent: Tue, Jul 21, 2020 12:58 pm
Subject: Re: [ap-gto] Tracking w/ Passil 4 polar alignment

Hi Roland,
I did setup using the pasill4 polar scope and got good alignment on the two stars through the polar scope. I did not use a PE curve. Do you think slight smearing in 25 secs given that rough setup is reasonable or should it be better?
Thanks, Rick


1100GTO

KHursh
 

I am probably very low on the list as I got on only a few months ago, but any idea when the next production run of the 1100 is? Thanks and clear skies!


Re: Tracking w/ Passil 4 polar alignment

Christopher Erickson
 

Depending on the lens focal lengths, personally I have found polar alignments with a PASILL4 to be more than accurate enough for astrophotography with SLR's ranging up to 30 minute exposures for wide fields.

Could be flexure someplace. If both cams show the same defects then it is something they both have in common.

Long cam lenses can exhibit a lot of flexure and sag, depending on how and where they are attached to the plate. And on their design and quality.

Turn off image stabilization too. It often has trouble with very dim scenes. And turn off autofocus, of course.

I hope this helps.

-Christopher Erickson
Observatory engineer
Waikoloa, HI 96738
www.summitkinetics.com
   


On Tue, Jul 21, 2020, 7:59 AM Wiggins, Rick <rickwiggins@...> wrote:
Hi Roland,
I did setup using the pasill4 polar scope and got good alignment on the two stars through the polar scope. I did not use a PE curve. Do you think slight smearing in 25 secs given that rough setup is reasonable or should it be better?
Thanks, Rick


Re: Mach2 Keypad

 

The list is verrrrry long. However, it is easy for folks to casually click the Notify Me button.  We don’t know how many will order when contacted.   Sorry I don’t have a good answer. Enjoy your 900 in the meantime.

 

Clear Skies,

 

Marj Christen

Astro-Physics, Inc

11250 Forest Hills Rd

Machesney Park, IL 61115

Phone: 815-282-1513

Fax: 815-282-9847

www.astro-physics.com

 

From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Michael Dolenga via groups.io
Sent: Tuesday, July 21, 2020 1:05 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Mach2 Keypad

 

Marj,

 

That sounds like a plan and it seems like Dean had something similar.

 

Should I ask on the ETA for the mount to ship? Or do I not want to know? :)

 

 

Michael

 

 

 

On Tuesday, July 21, 2020, 10:44:05 AM PDT, Marj Christen <marj@...> wrote:

 

 

Michael,

 

Our ADATRI tripod adapter can probably be attached to the top of the tripod as long as it has a flat surface. You may need to drill a few holes. We can visit that when/if you order the mount.

 

Clear Skies,

 

Marj Christen

Astro-Physics, Inc

11250 Forest Hills Rd

Machesney Park, IL 61115

Phone: 815-282-1513

Fax: 815-282-9847

www.astro-physics.com

 

From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Michael Dolenga via groups.io
Sent: Monday, July 20, 2020 9:29 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Mach2 Keypad

 

Hi Marj, nice to hear from you as well. That did the trick, I added myself to the list.

 

I have one of those apparently rare Rob Miller tripods from around 2011 when I got the 900GTO; strong and light, I'm sure one could construct an adapter. 

 

Michael

 

 

On Monday, July 20, 2020, 07:13:23 PM PDT, Marj Christen <marj@...> wrote:

 

 

Hello Michael,

 

So nice to hear from you.

 

The keypad from 2011 will work with the Mach2, however it will have to be updated to the upcoming v5 software and you will probably want to replace the keypad buttons with a new version.

 

The Mach2 base is the same as the 400, 600E or Mach1 base. It is smaller than the 900. However, there may be a way to use the same tripod.

 

The Notify Me button only shows up when click the button on the bottom of the screen on our website to accept cookies from our website.  You can click into the banner on the bottom to specify your preferences, but the cookies must be allowed. The reason is that you will be entering your email as part of the Notify Me process. So, we must have your permission to do this. I know it sounds silly, but that’s the way it works.

 

 

Clear Skies,

 

Marj Christen

Astro-Physics, Inc

11250 Forest Hills Rd

Machesney Park, IL 61115

Phone: 815-282-1513

Fax: 815-282-9847

www.astro-physics.com

 

From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Michael Dolenga via groups.io
Sent: Monday, July 20, 2020 7:25 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Mach2 Keypad

 

Opposite question, will a 2011 keypad sold with a new 900GTO work with the Mach2?

 

Another question, is the Mach 2 base the same as a 2011 series 900GTO base? Basically, can I use the same tripod?

 

Last question, how exactly do you get on the waiting list for a Mach 2? I don't see a "notify me" button anywhere on the page for the mount.

 

Michael

 

 

 

On Wednesday, June 24, 2020, 10:32:45 AM PDT, uncarollo2 <chris1011@...> via groups.io <chris1011@...> wrote:

 

 

The newest keypad version will work with CP4/CP5 controllers.

 

Rolando

 

 

 

-----Original Message-----
From: Dean Jacobsen <deanjacobsen@...>
To: main@ap-gto.groups.io
Sent: Wed, Jun 24, 2020 11:53 am
Subject: Re: [ap-gto] Mach2 Keypad

Will the new update be backward compatible with the older mounts as well?  For instance, if I update my existing keypad to work with the CP5, then can it also be used with my CP3 equipped 900GTO?
--
Dean Jacobsen
http://astrophoto.net/wp/ 
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 


Re: Mach2 Keypad

Michael Dolenga
 

Marj,

That sounds like a plan and it seems like Dean had something similar.

Should I ask on the ETA for the mount to ship? Or do I not want to know? :)


Michael



On Tuesday, July 21, 2020, 10:44:05 AM PDT, Marj Christen <marj@...> wrote:


Michael,

 

Our ADATRI tripod adapter can probably be attached to the top of the tripod as long as it has a flat surface. You may need to drill a few holes. We can visit that when/if you order the mount.

 

Clear Skies,

 

Marj Christen

Astro-Physics, Inc

11250 Forest Hills Rd

Machesney Park, IL 61115

Phone: 815-282-1513

Fax: 815-282-9847

www.astro-physics.com

 

From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Michael Dolenga via groups.io
Sent: Monday, July 20, 2020 9:29 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Mach2 Keypad

 

Hi Marj, nice to hear from you as well. That did the trick, I added myself to the list.

 

I have one of those apparently rare Rob Miller tripods from around 2011 when I got the 900GTO; strong and light, I'm sure one could construct an adapter. 

 

Michael

 

 

On Monday, July 20, 2020, 07:13:23 PM PDT, Marj Christen <marj@...> wrote:

 

 

Hello Michael,

 

So nice to hear from you.

 

The keypad from 2011 will work with the Mach2, however it will have to be updated to the upcoming v5 software and you will probably want to replace the keypad buttons with a new version.

 

The Mach2 base is the same as the 400, 600E or Mach1 base. It is smaller than the 900. However, there may be a way to use the same tripod.

 

The Notify Me button only shows up when click the button on the bottom of the screen on our website to accept cookies from our website.  You can click into the banner on the bottom to specify your preferences, but the cookies must be allowed. The reason is that you will be entering your email as part of the Notify Me process. So, we must have your permission to do this. I know it sounds silly, but that’s the way it works.

 

 

Clear Skies,

 

Marj Christen

Astro-Physics, Inc

11250 Forest Hills Rd

Machesney Park, IL 61115

Phone: 815-282-1513

Fax: 815-282-9847

www.astro-physics.com

 

From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Michael Dolenga via groups.io
Sent: Monday, July 20, 2020 7:25 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Mach2 Keypad

 

Opposite question, will a 2011 keypad sold with a new 900GTO work with the Mach2?

 

Another question, is the Mach 2 base the same as a 2011 series 900GTO base? Basically, can I use the same tripod?

 

Last question, how exactly do you get on the waiting list for a Mach 2? I don't see a "notify me" button anywhere on the page for the mount.

 

Michael

 

 

 

On Wednesday, June 24, 2020, 10:32:45 AM PDT, uncarollo2 <chris1011@...> via groups.io <chris1011@...> wrote:

 

 

The newest keypad version will work with CP4/CP5 controllers.

 

Rolando

 

 

 

-----Original Message-----
From: Dean Jacobsen <deanjacobsen@...>
To: main@ap-gto.groups.io
Sent: Wed, Jun 24, 2020 11:53 am
Subject: Re: [ap-gto] Mach2 Keypad

Will the new update be backward compatible with the older mounts as well?  For instance, if I update my existing keypad to work with the CP5, then can it also be used with my CP3 equipped 900GTO?
--
Dean Jacobsen
http://astrophoto.net/wp/ 
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 


Re: Tracking w/ Passil 4 polar alignment

Wiggins, Rick
 

Hi Roland,
I did setup using the pasill4 polar scope and got good alignment on the two stars through the polar scope. I did not use a PE curve. Do you think slight smearing in 25 secs given that rough setup is reasonable or should it be better?
Thanks, Rick


NGC6960

Mike Dodd
 

I've long been attracted to the Veil Nebula, but never could image NGC6960, The Witch's Broom, because my old ST-8 CCD camera bloomed the bright star. But my current ASI1600MCP one-shot color CMOS camera doesn't bloom, so now this target is in play.

Recently I managed to acquire nearly 5 hours of data over three rare clear nights, and hope to get another 3-4 hours when the sky clears again. Here's what I have so far: <http://astronomy.mdodd.com/nebulae-17.html>

I rotated the camera to capture as much of the "broom" as possible on the sensor, corner-to-corner. I never knew there was so much faint H-a nebulosity close-by. Maybe additional data will reveal more.

Comments and suggestions welcome.

TMB-130SS APO @ f/7 on an AP1200.

--- Mike
http://astronomy.mdodd.com


Re: Mach2 Keypad

 

Michael,

 

Our ADATRI tripod adapter can probably be attached to the top of the tripod as long as it has a flat surface. You may need to drill a few holes. We can visit that when/if you order the mount.

 

Clear Skies,

 

Marj Christen

Astro-Physics, Inc

11250 Forest Hills Rd

Machesney Park, IL 61115

Phone: 815-282-1513

Fax: 815-282-9847

www.astro-physics.com

 

From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Michael Dolenga via groups.io
Sent: Monday, July 20, 2020 9:29 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Mach2 Keypad

 

Hi Marj, nice to hear from you as well. That did the trick, I added myself to the list.

 

I have one of those apparently rare Rob Miller tripods from around 2011 when I got the 900GTO; strong and light, I'm sure one could construct an adapter. 

 

Michael

 

 

On Monday, July 20, 2020, 07:13:23 PM PDT, Marj Christen <marj@...> wrote:

 

 

Hello Michael,

 

So nice to hear from you.

 

The keypad from 2011 will work with the Mach2, however it will have to be updated to the upcoming v5 software and you will probably want to replace the keypad buttons with a new version.

 

The Mach2 base is the same as the 400, 600E or Mach1 base. It is smaller than the 900. However, there may be a way to use the same tripod.

 

The Notify Me button only shows up when click the button on the bottom of the screen on our website to accept cookies from our website.  You can click into the banner on the bottom to specify your preferences, but the cookies must be allowed. The reason is that you will be entering your email as part of the Notify Me process. So, we must have your permission to do this. I know it sounds silly, but that’s the way it works.

 

 

Clear Skies,

 

Marj Christen

Astro-Physics, Inc

11250 Forest Hills Rd

Machesney Park, IL 61115

Phone: 815-282-1513

Fax: 815-282-9847

www.astro-physics.com

 

From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Michael Dolenga via groups.io
Sent: Monday, July 20, 2020 7:25 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Mach2 Keypad

 

Opposite question, will a 2011 keypad sold with a new 900GTO work with the Mach2?

 

Another question, is the Mach 2 base the same as a 2011 series 900GTO base? Basically, can I use the same tripod?

 

Last question, how exactly do you get on the waiting list for a Mach 2? I don't see a "notify me" button anywhere on the page for the mount.

 

Michael

 

 

 

On Wednesday, June 24, 2020, 10:32:45 AM PDT, uncarollo2 <chris1011@...> via groups.io <chris1011@...> wrote:

 

 

The newest keypad version will work with CP4/CP5 controllers.

 

Rolando

 

 

 

-----Original Message-----
From: Dean Jacobsen <deanjacobsen@...>
To: main@ap-gto.groups.io
Sent: Wed, Jun 24, 2020 11:53 am
Subject: Re: [ap-gto] Mach2 Keypad

Will the new update be backward compatible with the older mounts as well?  For instance, if I update my existing keypad to work with the CP5, then can it also be used with my CP3 equipped 900GTO?
--
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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