Date   

Re: Mach2 lost?

Shailesh Trivedi
 

This worked, thanks Tim.

Shailesh


Re: Mach2 lost?

Shailesh Trivedi
 

Roland,

One can read the FITs header using a program like Pixinsighg. The header shows X/Y binning, sensor temperature, RA & DEC and a few other parameters in plain text. The rest is binary.

Shailesh


Re: Field rotation in long exposures?

Worsel
 

Handy calculator here

http://celestialwonders.com/tools/rotationMaxErrorCalc.html

This along with your specific image scale will rovide an insight on to trailing

Bryan


Re: Field rotation in long exposures?

Roland Christen
 

Best thing to do is not put the subject of your image at the edges of the format. That way it will be sharp, at best focus and at best resolution. Stuck out tongue closed eyes

Rolando

-----Original Message-----
From: Tom Blahovici <tom.va2fsq@...>
To: main@ap-gto.groups.io
Sent: Sat, Dec 11, 2021 3:06 pm
Subject: [ap-gto] Field rotation in long exposures?

I am wondering if field rotation will show in a long exposure astrophoto when guiding if you are not perfectly polar aligned.
I use pempro for alignment and usually get to within 1.5 to 2 arc minutes of the pole as determined by an appm model. 
Now with tracking that is excellent (0.3arcs rms) I am seeing that stars on the edge of a 35mm chip appear elongated. This elongation appears to be worse going from a 2 minute exposure to a 20 minute exposure. The difference is not huge but it is there when you zoom in.
How close to perfect alignment must one be  for a shot of let's say 30 minutes with a scope that has a field of view of 2 degrees? Is these a way to calculate this?
Tom

--
Roland Christen
Astro-Physics


Re: Field rotation in long exposures?

Bill Long
 

Which camera and which optics?


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Tom Blahovici <tom.va2fsq@...>
Sent: Saturday, December 11, 2021 1:06 PM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: [ap-gto] Field rotation in long exposures?
 
I am wondering if field rotation will show in a long exposure astrophoto when guiding if you are not perfectly polar aligned.
I use pempro for alignment and usually get to within 1.5 to 2 arc minutes of the pole as determined by an appm model. 
Now with tracking that is excellent (0.3arcs rms) I am seeing that stars on the edge of a 35mm chip appear elongated. This elongation appears to be worse going from a 2 minute exposure to a 20 minute exposure. The difference is not huge but it is there when you zoom in.
How close to perfect alignment must one be  for a shot of let's say 30 minutes with a scope that has a field of view of 2 degrees? Is these a way to calculate this?
Tom


Field rotation in long exposures?

Tom Blahovici
 

I am wondering if field rotation will show in a long exposure astrophoto when guiding if you are not perfectly polar aligned.
I use pempro for alignment and usually get to within 1.5 to 2 arc minutes of the pole as determined by an appm model. 
Now with tracking that is excellent (0.3arcs rms) I am seeing that stars on the edge of a 35mm chip appear elongated. This elongation appears to be worse going from a 2 minute exposure to a 20 minute exposure. The difference is not huge but it is there when you zoom in.
How close to perfect alignment must one be  for a shot of let's say 30 minutes with a scope that has a field of view of 2 degrees? Is these a way to calculate this?
Tom


Re: Mach2 lost?

Roland Christen
 

What do you mean by a Fit header?

Check to make sure that your time and daylight savings is set correctly. Daylight savings is now Winter.

Roland

-----Original Message-----
From: Shailesh Trivedi <shailesh.trivedi@...>
To: main@ap-gto.groups.io
Sent: Fri, Dec 10, 2021 11:18 pm
Subject: [ap-gto] Mach2 lost?

I believe my Mach2 is "lost", the RA & DEC values in the FIT header is wrong. How do I get the Mach2 to a known position?

--
Roland Christen
Astro-Physics


Re: New site location setting in APCC

Ray Gralak
 

Hi Peter,

Site information is only sent to the mount during initialization. So, first, you define a site, then set it to be the site from which to be initialized, then power cycle the mount. This will allow APCC to initialize the mount with the new site settings.

-Ray

-----Original Message-----
From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Peter Gottstein
Sent: Saturday, December 11, 2021 8:13 AM
To: main@ap-gto.groups.io
Subject: [ap-gto] New site location setting in APCC

I recently moved my MACH 2 mount with encoders to ARizona. My old location was Illinois. When I try to input
new location in APCC and ask the hit button for get location from mount. It defaults to OLD longitude and
latitude. I also changed offset time to Arizona. Do I have to Manually enter in latitude and longitude
coordinates in order for new sure location to take place? Is this correct procedure when moving locations?

thank you





New site location setting in APCC

Peter Gottstein
 

I recently moved my MACH 2 mount with encoders to ARizona. My old location was Illinois. When I try to input new location in APCC and ask the hit button for get location from mount. It defaults to OLD longitude and latitude. I also changed offset time to Arizona. Do I have to Manually enter in latitude and longitude coordinates in order for new sure location to take place? Is this correct procedure when moving locations?

thank you



Re: Mach2 Platesolve fails in TSX

Ray Gralak
 

Shailesh,

First, there's nothing special required for plate-solving with the Mach2. So, you can eliminate any concern you may have that's there may be some special setting for the Mach2.

However, you will need to provide more details because there are too many possibilities for what could be wrong.

Here are some things you can provide:

1. Describe how you are doing the plate solve. (e.g. manually, APPM, NINA, SGPro, etc.)
1a. If you are using APPM, which camera type are you using?
2. What error message are you getting? Can you provide a screenshot?
3. What is the exact build of SkyX?
4. Which camera are you using?
5. Which telescope are you using?
6. What is the Image scale?
7. Have you performed all of the setup information in APPM's plate solve section for SkyX?

And are there any other details you may think could be important?

-Ray

-----Original Message-----
From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Shailesh Trivedi
Sent: Friday, December 10, 2021 7:51 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Mach2 Platesolve fails in TSX

Reporting, stil no luck with TSX plate solves .


Re: Mach2 lost?

Ray Gralak
 

I believe my Mach2 is "lost", the RA & DEC values in the FIT header is wrong. How do I get the Mach2 to a
known position?
As Tim already suggested, homing the mount will restore the correct mount position.

-Ray

-----Original Message-----
From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Shailesh Trivedi
Sent: Friday, December 10, 2021 9:18 PM
To: main@ap-gto.groups.io
Subject: [ap-gto] Mach2 lost?

I believe my Mach2 is "lost", the RA & DEC values in the FIT header is wrong. How do I get the Mach2 to a
known position?


Re: Mach2 lost?

Ray Gralak
 

But I do not see an AE tab. Is this something that only appears when connected to the mount?
Yes, if the mount has encoders, the AE tab will appear when APCC connects.

-Ray

-----Original Message-----
From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Larry Phillips
Sent: Saturday, December 11, 2021 6:47 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Mach2 lost?

Tim, as an interested viewer of this thread, I know how to go to the Park tab and then the Park dialog box at
the top center, then to the "Park to this Position" drop down park and select Home. But I do not see an AE
tab. Is this something that only appears when connected to the mount?
Larry


Re: Mach2 lost?

Larry Phillips
 
Edited

Tim, as an interested viewer of this thread, I know how to go to the Park tab and then the Park dialog box at the top center, then to the "Park to this Position" drop down box and select Home.  But I do not see an AE tab.  Is this something that only appears when connected to the mount?
Larry


Re: Mach2 lost?

Tim Morrill
 

I’m APCC go to the AE tab, under AE actions click the big find home button that should get it straightened out.


Mach2 lost?

Shailesh Trivedi
 

I believe my Mach2 is "lost", the RA & DEC values in the FIT header is wrong. How do I get the Mach2 to a known position?


Re: Mach2 Platesolve fails in TSX

Shailesh Trivedi
 

Reporting, stil no luck with TSX plate solves .


Re: Side-by-Side Balancing Procedure

M Hambrick
 

Thanks George

Yes, I followed those instructions through step 6 using the wood dowel before I attached anything to the mount. They got me pretty close, except that as Chris noted above, when I attached everything to the mount, the balance point determined in steps 3 and 5 resulted in the declination balance point being too far forward (about 7/8" in my case). Once I corrected this by sliding the scopes to the rear, the balance was much closer. Then I used the procedure described in my previous post to fine tune the balance. 

The picture below may help to clarify. This shows the Pronto guide scope position after fine tuning the balance, but the main scope was essentially the same. It was just easier to get a good photograph on this side.

In the picture you can see the declination top plate, the DOVELM162 primary dovetail saddle, the SBD13SS side-by-side plate, the DOVEDV10 dovetail saddle for the Pronto guide scope, the SBD12 dovetail plate for the Pronto, and finally the Pronto. The blue pieces of tape mark the balance points. The bottom two pieces show the location of the front-to-back balance point for the SBD13SS with both of the scope dovetail saddles attached (step 3). The top piece of tape shows the balance point for the Pronto and SBD12 (step 1 or 2).

Initially all three pieces of tape were lined up according to step 4 in the procedure, but when attached to the mount, the assembly was too heavy in front. I was able to achieve balance by moving both scopes and dovetail plates back by about 7/8" You can see that this new position is pretty close to the centerline of the declination top plate.

Mike


Re: Mach2 Platesolve fails in TSX

Shailesh Trivedi
 

Thanks, Ray.

in digging further I found in the APPM Platesolve tab the image scale was also from my AP1100 mount camera, and I corrected it also. Perhaps it was this setting which was resulting in a plate solve fail on Mach2. Tonight is expected to be clear, I will try again.

Shailesh


Re: Mach2 Platesolve fails in TSX

Ray Gralak
 

The Platesolve documentation asks to connect TSX via the AP V2 Ascom driver. I did not see the AP
V2 Ascom driver in TSX but connected via Ascom. Is this ok?
Yes, that is the only way for SkyX to connect to the AP V2 ASCOM driver.

-Ray

-----Original Message-----
From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Shailesh Trivedi
Sent: Friday, December 10, 2021 9:39 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Mach2 Platesolve fails in TSX

Ray,


I was not trying to create an APPM model yet so did not look until you prompted me to. I realized that in
APPM under Scope Connect Driver Settings the mount was AP1100, not sure if this is the reason for the
issue. The Platesolve documentation asks to connect TSX via the AP V2 Ascom driver. I did not see the AP
V2 Ascom driver in TSX but connected via Ascom. Is this ok?

Shailesh


On another note, the APPM platesolve also mentions to user A


Re: Mach2 Platesolve fails in TSX

Shailesh Trivedi
 

Ray,


I was not trying to create an APPM model yet so did not look until you prompted me to. I realized that in APPM under Scope Connect Driver Settings the mount was AP1100, not sure if this is the reason for the issue. The Platesolve documentation asks to connect TSX via the AP V2 Ascom driver. I did not see the AP V2 Ascom driver in TSX but connected via Ascom. Is this ok?

Shailesh


On another note, the APPM platesolve also mentions to user A

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