Date   

Re: large alignment error with polemaster & mach2

 

>>>I will give a chance to the pole master+SC software.

in my experience it works fantastically well

one note: make sure you enter the setup information correctly in Sharpcap. It's not clear but you need to ensure you enter your location/date/time and also your image scale. it doesn't really warn you about that



On Sat, Aug 1, 2020 at 11:42 AM Andrea Lucchetti <andlucchett@...> wrote:
Thank you, 
I will give a chance to the pole master+SC software.
If it doesn’t work , I will probably go for the Rapas.
Andrea

Il giorno sab 1 ago 2020 alle 16:41 uncarollo2 <chris1011@...> via groups.io <chris1011=aol.com@groups.io> ha scritto:
The Rapas will require you to drift align the mount for the first time. Then you adjust the Rapas precisely using the 3 push-pull screws. From then on you can get good polar alignment using the pole scope without having to do any other alignment.

Rolando



-----Original Message-----
From: Andrea Lucchetti <andlucchett@...>
To: main@ap-gto.groups.io
Sent: Sat, Aug 1, 2020 7:51 am
Subject: [ap-gto] large alignment error with polemaster & mach2

Hello,
I need to polar align my Mach 2 very quickly to save time on field.
I thought Polemaster would have been a good choice but I cant get a good alignment with it (I am ways off)
The procedure goes very well, till the end, including the precise alignment step, but I have drift in my images.
running the Polemaster twice results in a small change.


I am not using the refraction calculation , as I leave at 42 deg latitude: can this be one of the reason?

my aim is to shoot 10 min subs unguided (@790mm focal and 1,6 arcsec/pixel resolution).

I still don't have my OTA ready so it is difficult for me to check with the drift method for the time being ( I can borrow a dslr and C8)

Would the RAPAS be a better solution for my needs? 
I understand it can be mounted on the MACH2 using a dovetail, with repeatable accuracy.
Is the accuracy enough for imaging and how it compares to Polemaster?

Thank you,
Andrea



--
Brian 



Brian Valente


Re: large alignment error with polemaster & mach2

Cheng-Yang Tan
 

One thing that I use SC + PM camera for after polar alignment is monitoring sky conditions. IMO, it’s a complete waste to have a camera just sitting there and doing nothing after polar alignment. I have the 
PM camera mounted on the saddle and thus it is always pointing to where the imaging scope is pointing. Then I have SC do “multistar FWHM measurement” of all the stars. It’s a good measure of whether the sky is deteriorating during the imaging session

On Saturday, August 1, 2020, 1:32 PM, Dale Ghent <daleg@...> wrote:


Yes. The PA feature alone is worth the ~$15 a year cost, in addition to the general usefulness that SharpCap offers. I don't mind supporting Robin's efforts.

> On Aug 1, 2020, at 11:02 AM, uncarollo2 <chris1011@...> via groups.io <chris1011=aol.com@groups.io> wrote:
>
>
> Unfortunately, SC polar alignment costs $
> Everything should not be zero cost. Writing software takes time and expertise and should be rewarded. If everything is zero cost we will all be forced to become subsistence farmers scraping a living from the soil.
>
> Rolando
>
>
> -----Original Message-----
> From: Cheng-Yang Tan via groups.io <cytan299=yahoo.com@groups.io>
> To: main@ap-gto.groups.io
> Sent: Sat, Aug 1, 2020 8:18 am
> Subject: Re: [ap-gto] large alignment error with polemaster & mach2
>
> I’d suggest trying Sharpcap with the Polemaster camera. I’ve always found Sharpcap gives a better PA than the Polemaster software. An advantage of SC is that it gives an alignment error when you are adjusting alt and az which is absent in PM software.
>
> Unfortunately, SC polar alignment costs $ and is an annual subscription, but it’s cheap.
>
> As usual YMMV
>
> cytan
>
>
> Sent from Yahoo Mail for iPad
>
> On Saturday, August 1, 2020, 7:51 AM, Andrea Lucchetti <andlucchett@...> wrote:
> Hello,
> I need to polar align my Mach 2 very quickly to save time on field.
> I thought Polemaster would have been a good choice but I cant get a good alignment with it (I am ways off)
> The procedure goes very well, till the end, including the precise alignment step, but I have drift in my images.
> running the Polemaster twice results in a small change.
>
>
> I am not using the refraction calculation , as I leave at 42 deg latitude: can this be one of the reason?
>
> my aim is to shoot 10 min subs unguided (@790mm focal and 1,6 arcsec/pixel resolution).
>
> I still don't have my OTA ready so it is difficult for me to check with the drift method for the time being ( I can borrow a dslr and C8)
>
> Would the RAPAS be a better solution for my needs?
> I understand it can be mounted on the MACH2 using a dovetail, with repeatable accuracy.
> Is the accuracy enough for imaging and how it compares to Polemaster?
>
> Thank you,
> Andrea
>




Re: large alignment error with polemaster & mach2

Andrea Lucchetti
 

Thank you, 
I will give a chance to the pole master+SC software.
If it doesn’t work , I will probably go for the Rapas.
Andrea

Il giorno sab 1 ago 2020 alle 16:41 uncarollo2 <chris1011@...> via groups.io <chris1011=aol.com@groups.io> ha scritto:
The Rapas will require you to drift align the mount for the first time. Then you adjust the Rapas precisely using the 3 push-pull screws. From then on you can get good polar alignment using the pole scope without having to do any other alignment.

Rolando



-----Original Message-----
From: Andrea Lucchetti <andlucchett@...>
To: main@ap-gto.groups.io
Sent: Sat, Aug 1, 2020 7:51 am
Subject: [ap-gto] large alignment error with polemaster & mach2

Hello,
I need to polar align my Mach 2 very quickly to save time on field.
I thought Polemaster would have been a good choice but I cant get a good alignment with it (I am ways off)
The procedure goes very well, till the end, including the precise alignment step, but I have drift in my images.
running the Polemaster twice results in a small change.


I am not using the refraction calculation , as I leave at 42 deg latitude: can this be one of the reason?

my aim is to shoot 10 min subs unguided (@790mm focal and 1,6 arcsec/pixel resolution).

I still don't have my OTA ready so it is difficult for me to check with the drift method for the time being ( I can borrow a dslr and C8)

Would the RAPAS be a better solution for my needs? 
I understand it can be mounted on the MACH2 using a dovetail, with repeatable accuracy.
Is the accuracy enough for imaging and how it compares to Polemaster?

Thank you,
Andrea


Re: large alignment error with polemaster & mach2

Dale Ghent
 

Yes. The PA feature alone is worth the ~$15 a year cost, in addition to the general usefulness that SharpCap offers. I don't mind supporting Robin's efforts.

On Aug 1, 2020, at 11:02 AM, uncarollo2 <chris1011@aol.com> via groups.io <chris1011=aol.com@groups.io> wrote:


Unfortunately, SC polar alignment costs $
Everything should not be zero cost. Writing software takes time and expertise and should be rewarded. If everything is zero cost we will all be forced to become subsistence farmers scraping a living from the soil.

Rolando


-----Original Message-----
From: Cheng-Yang Tan via groups.io <cytan299=yahoo.com@groups.io>
To: main@ap-gto.groups.io
Sent: Sat, Aug 1, 2020 8:18 am
Subject: Re: [ap-gto] large alignment error with polemaster & mach2

I’d suggest trying Sharpcap with the Polemaster camera. I’ve always found Sharpcap gives a better PA than the Polemaster software. An advantage of SC is that it gives an alignment error when you are adjusting alt and az which is absent in PM software.

Unfortunately, SC polar alignment costs $ and is an annual subscription, but it’s cheap.

As usual YMMV

cytan


Sent from Yahoo Mail for iPad

On Saturday, August 1, 2020, 7:51 AM, Andrea Lucchetti <andlucchett@gmail.com> wrote:
Hello,
I need to polar align my Mach 2 very quickly to save time on field.
I thought Polemaster would have been a good choice but I cant get a good alignment with it (I am ways off)
The procedure goes very well, till the end, including the precise alignment step, but I have drift in my images.
running the Polemaster twice results in a small change.


I am not using the refraction calculation , as I leave at 42 deg latitude: can this be one of the reason?

my aim is to shoot 10 min subs unguided (@790mm focal and 1,6 arcsec/pixel resolution).

I still don't have my OTA ready so it is difficult for me to check with the drift method for the time being ( I can borrow a dslr and C8)

Would the RAPAS be a better solution for my needs?
I understand it can be mounted on the MACH2 using a dovetail, with repeatable accuracy.
Is the accuracy enough for imaging and how it compares to Polemaster?

Thank you,
Andrea


Re: APPC refraction correction question

Craig Young
 

That is great news.  Still have not had a clear night yet to try 3 arc lines, weather forecast is showing early next week .. I think the night of the full moon (typical).  When using 3 arc lines, what was the DEC (degrees between each DEC arc) and RA (degrees between each sample) spacing used?

Craig


Re: large alignment error with polemaster & mach2

Christopher Erickson
 

SharpCap Pro is a critical tool for me. I use it for controlling my QHY174M-GPS cameras when doing occultations. The price is dirt-cheap and I would still pay for it at four times the price. It is the only camera control program that is capable of collecting the GPS timing and location data from the cam and putting it into the FITS headers while collecting up to 450 frames a second. If course most of the time I am collecting frames at about 4 frames per second.

It's an amazing program for the price. And for many people, the free version is sufficient.


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


On Sat, Aug 1, 2020, 5:29 AM Cheng-Yang Tan via groups.io <cytan299=yahoo.com@groups.io> wrote:
Hi Rolando,
   I think my "Unfortunately, SC polar alignment costs $", is more of a lament that the software that comes with PM does not seem to be as accurate and the op has to spend money to get it to work better.

  To be clear, I don't begrudge people making money from doing software work.

cytan

On Saturday, August 1, 2020, 10:02:50 AM CDT, uncarollo2 <chris1011@...> wrote:



Unfortunately, SC polar alignment costs $
Everything should not be zero cost. Writing software takes time and expertise and should be rewarded. If everything is zero cost we will all be forced to become subsistence farmers scraping a living from the soil.

Rolando


-----Original Message-----
From: Cheng-Yang Tan via groups.io <cytan299=yahoo.com@groups.io>
To: main@ap-gto.groups.io
Sent: Sat, Aug 1, 2020 8:18 am
Subject: Re: [ap-gto] large alignment error with polemaster & mach2

I’d suggest trying Sharpcap with the Polemaster camera. I’ve always found Sharpcap gives a better PA than the Polemaster software. An advantage of SC is that it gives an alignment error when you are adjusting alt and az which is absent in PM software.

Unfortunately, SC polar alignment costs $ and is an annual subscription, but it’s cheap.

As usual YMMV

cytan


Sent from Yahoo Mail for iPad

On Saturday, August 1, 2020, 7:51 AM, Andrea Lucchetti <andlucchett@...> wrote:
Hello,
I need to polar align my Mach 2 very quickly to save time on field.
I thought Polemaster would have been a good choice but I cant get a good alignment with it (I am ways off)
The procedure goes very well, till the end, including the precise alignment step, but I have drift in my images.
running the Polemaster twice results in a small change.


I am not using the refraction calculation , as I leave at 42 deg latitude: can this be one of the reason?

my aim is to shoot 10 min subs unguided (@790mm focal and 1,6 arcsec/pixel resolution).

I still don't have my OTA ready so it is difficult for me to check with the drift method for the time being ( I can borrow a dslr and C8)

Would the RAPAS be a better solution for my needs? 
I understand it can be mounted on the MACH2 using a dovetail, with repeatable accuracy.
Is the accuracy enough for imaging and how it compares to Polemaster?

Thank you,
Andrea


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

Joe Zeglinski
 

Repetitive Duplication of posted forum messages:
 
    For example, searching through this group’s posts over the past 2 years, I found from “Jimmyjujames” ...  6 edited copies from 1/11/2019, and yet another 6 copies of the very same EDITED message a week later on  9/11/2019. I don’t login via browser by download emails via client, so is this  “EDIT option” a part of the Groups.IO system?
Nothing was “actually edited” in any of those duplicates, not even so much as a “comma replacing a period” ! This is just one example of dozens of such repeating posts.
 
    The original AP_GTO group was  moved from YAHOO to Groups.IO much later that year,  on 24/10.2019 – so the problem is likely not the fault of the Groups.IO server app, or of the AP forums, but perhaps the email client app used to post their messages. I have found a few other members, on about a dozen other Group.IO  forums, so the duplication is not unique to the Astrophysics forums  membership, though I would say the majority are here, owing to its large membership.
 
    Scanning my saved emails list for this [AP_GTO] group, I have come across several other members – using various ISP’s (Gmail, Yahoo, Outlook, etc., even Groups.IO) – extra emails which I usually have to delete, wasting time and disk space, since they seem to be useless Duplicates, made in error, over this sampled timespan. The EDITED posts are good to see, if they had a REASON (option line) attached for it, but the vast majority, with ray’s being an exception, are just copies, without any changes made.  Folks, please exercise some care. Here are most of the sources I found in the past 2 years.
  1. Leo Shatz
  2. DiscoDuck
  3. Dominique Durand
  4. Mojo Jones
  5. CurtisC
  6. Mikko Viljamaa
  7. Even a valid one from Ray Gralak:
            [Edited Message Follows]
            [Reason: Removed leading "Also" in first paragraph, which I forgot to remove when I moved the paragraph to the top.]
            ... another time: [Reason: Misspelled Brian. Sorry!]
  8. Dean Jacobsen
  9. Jimmyjujames (most of the duplicates)
  10. Robert Berta – a valid Editing – [Reason: Clarification of question.]
  11. Peter Bresler

  12. Jack Huerkamp

  13. Terri Zittritsch

  14. Wayne Hixson

  15. Tony Benjamin

  16. Luke Leege

  17. Calypte

  18. Jerome A Yesavage

  19. Bruce Donzati

  20. Drgert1

  21. Isphotoman

    Are duplicates with the heading  “[Edited Message Follows]” – coming from their (common) smartphone email apps, or from their browser, which might also be the same one, for all those members whose email was repeatedly sent with just the text line  “[Edited Message Follows]” added at the top?

    A few of the old posts saved in my group  Live Mail folder , really are valid  EDITED duplicates, since I found a couple which had yet a second attached  line,  added by the editor below that first one,  stating for example  “[Reason: Added info]”.
Perhaps some members keep clicking on the SEND in their browser, and multiple copies are generated by the smartphone email app or browser – or their mouse button/screen-tap,  is sticky. Certainly doesn’t seem to be the fault of the Group.IO server, based on our transition date being later than the oldest occurrence of “[Edited Message Follows]” insertions.
 
    There may be some commonality among all those duplicates generated by several group members.
Otherwise, there is an on-going problem for the rest of us, who have to check &  (possibly) delete such suspect duplicates,
 
    So, please check your own device – surely you must be seeing your own duplicates sent back to your device,  from [AP_GTO} or other Groups.IO.
 
Joe Z.


Moving to a new imaging laptop #APCC

Dean Jacobsen
 

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/ 


Re: large alignment error with polemaster & mach2

Cheng-Yang Tan
 

Hi Rolando,
   I think my "Unfortunately, SC polar alignment costs $", is more of a lament that the software that comes with PM does not seem to be as accurate and the op has to spend money to get it to work better.

  To be clear, I don't begrudge people making money from doing software work.

cytan

On Saturday, August 1, 2020, 10:02:50 AM CDT, uncarollo2 <chris1011@...> wrote:



Unfortunately, SC polar alignment costs $
Everything should not be zero cost. Writing software takes time and expertise and should be rewarded. If everything is zero cost we will all be forced to become subsistence farmers scraping a living from the soil.

Rolando


-----Original Message-----
From: Cheng-Yang Tan via groups.io <cytan299@...>
To: main@ap-gto.groups.io
Sent: Sat, Aug 1, 2020 8:18 am
Subject: Re: [ap-gto] large alignment error with polemaster & mach2

I’d suggest trying Sharpcap with the Polemaster camera. I’ve always found Sharpcap gives a better PA than the Polemaster software. An advantage of SC is that it gives an alignment error when you are adjusting alt and az which is absent in PM software.

Unfortunately, SC polar alignment costs $ and is an annual subscription, but it’s cheap.

As usual YMMV

cytan


Sent from Yahoo Mail for iPad

On Saturday, August 1, 2020, 7:51 AM, Andrea Lucchetti <andlucchett@...> wrote:
Hello,
I need to polar align my Mach 2 very quickly to save time on field.
I thought Polemaster would have been a good choice but I cant get a good alignment with it (I am ways off)
The procedure goes very well, till the end, including the precise alignment step, but I have drift in my images.
running the Polemaster twice results in a small change.


I am not using the refraction calculation , as I leave at 42 deg latitude: can this be one of the reason?

my aim is to shoot 10 min subs unguided (@790mm focal and 1,6 arcsec/pixel resolution).

I still don't have my OTA ready so it is difficult for me to check with the drift method for the time being ( I can borrow a dslr and C8)

Would the RAPAS be a better solution for my needs? 
I understand it can be mounted on the MACH2 using a dovetail, with repeatable accuracy.
Is the accuracy enough for imaging and how it compares to Polemaster?

Thank you,
Andrea


Re: large alignment error with polemaster & mach2

Dean Jacobsen
 

SharpCap Pro, the version that has the polar alignment tool, is actually a very nice little program.  Lots of stuff you can do with it.  It will run my camera, manage the cooling, run the filter wheel, etc.  The polar alignment tool is very cool and easy to use.
--
Dean Jacobsen
http://astrophoto.net/wp/
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 


Re: Planet Tracking and Imaging #Mach2GTO #APCC

thefamily90 Phillips
 

Reply sent


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Greg Vaughn <gregvaughn@...>
Sent: Saturday, August 1, 2020 9:59:17 AM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] Planet Tracking and Imaging
 

Hi Jim,

 

Thanks for your thorough and helpful response.   Your image of Saturn is spectacular and indicates that while I’m following a similar workflow to the one you described, I’m not getting the same kind of results.  Hence the reason I was searching for some improvement.

 

Since your results are so far superior, I’ve sent you a note directly, explaining my challenges in a little more detail and asking you to share some of your secret sauce.

 

Thanks again.

 

Cheers,

Greg

 


Virus-free. www.avast.com


Re: large alignment error with polemaster & mach2

Roland Christen
 


Unfortunately, SC polar alignment costs $
Everything should not be zero cost. Writing software takes time and expertise and should be rewarded. If everything is zero cost we will all be forced to become subsistence farmers scraping a living from the soil.

Rolando


-----Original Message-----
From: Cheng-Yang Tan via groups.io <cytan299@...>
To: main@ap-gto.groups.io
Sent: Sat, Aug 1, 2020 8:18 am
Subject: Re: [ap-gto] large alignment error with polemaster & mach2

I’d suggest trying Sharpcap with the Polemaster camera. I’ve always found Sharpcap gives a better PA than the Polemaster software. An advantage of SC is that it gives an alignment error when you are adjusting alt and az which is absent in PM software.

Unfortunately, SC polar alignment costs $ and is an annual subscription, but it’s cheap.

As usual YMMV

cytan


Sent from Yahoo Mail for iPad

On Saturday, August 1, 2020, 7:51 AM, Andrea Lucchetti <andlucchett@...> wrote:
Hello,
I need to polar align my Mach 2 very quickly to save time on field.
I thought Polemaster would have been a good choice but I cant get a good alignment with it (I am ways off)
The procedure goes very well, till the end, including the precise alignment step, but I have drift in my images.
running the Polemaster twice results in a small change.


I am not using the refraction calculation , as I leave at 42 deg latitude: can this be one of the reason?

my aim is to shoot 10 min subs unguided (@790mm focal and 1,6 arcsec/pixel resolution).

I still don't have my OTA ready so it is difficult for me to check with the drift method for the time being ( I can borrow a dslr and C8)

Would the RAPAS be a better solution for my needs? 
I understand it can be mounted on the MACH2 using a dovetail, with repeatable accuracy.
Is the accuracy enough for imaging and how it compares to Polemaster?

Thank you,
Andrea


Re: Planet Tracking and Imaging #Mach2GTO #APCC

thefamily90 Phillips
 

You can go up to 90+ seconds on Jupiter without any recognizable blurring after stacking in Registax.
There is also a derotation ability in an app that lets you go for much much longer periods of time without blurring.

Jim


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 10:34:18 AM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] Planet Tracking and Imaging #Mach2GTO #APCC
 
You would not see any motion at 30 seconds for any planet. However, in 30 seconds you will experience rotation on Jupiter, which is something else indeed.

Rolando



-----Original Message-----
From: Greg Vaughn <gregvaughn@...>
To: main@ap-gto.groups.io
Sent: Fri, Jul 31, 2020 10:33 pm
Subject: [ap-gto] Planet Tracking and Imaging #Mach2GTO #APCC

This is a question for Ray Gralak after watching his July 2016 video about Horizons again.  The question and/or response may be of interest to others as well.

Hi Ray,

in your Horizons video you mention downloading ephemeris data for Mars as an example of what Horizons can be used for - beyond tracking comets.  If I'm going to use the Mach 1 or Mach 2 to image Jupiter, Saturn or Mars, can I download ephemeris data for them in Horizons, do an APPM model and then reasonably expect to be able to track one of the planets with enough precision for good lucky (video) imaging.   Does it make a difference between the Mach 1 or Mach 2.   

I know there are some changes coming with the new keypad software, but the question is for an attempt to image the planets while they are still in my field of view and with a very long effective focal length (~5,700-11,400mm)  - using an 11in Edge HD and a barlow or PowerMate (2X-4X).  Using a ZWO ASI 174 OSC, the image scale would be about .212 to .106 arcsec/pixel while for the ZWO 1600MM it would be .138 to .069 - if I've calculated these correctly.  At any rate, they would need very accurate tracking during the length of the video which for Jupiter would be about 30sec if I remember correctly.

I've been focused on nebulae targets, but would like to shift scopes and catch the planets before they are gone. (I know I'm running a little late already.)

Thanks in advance for any insights from you on how best to leverage APCC for this task and any critiques on my thought process and setup.

Cheers,
Greg

p.s.  I'm limited in my views of the planets to the azimuthal range of about 110-185 deg true, so my APPM model is primarily an East model.


Re: large alignment error with polemaster & mach2

Roland Christen
 

The Rapas will require you to drift align the mount for the first time. Then you adjust the Rapas precisely using the 3 push-pull screws. From then on you can get good polar alignment using the pole scope without having to do any other alignment.

Rolando



-----Original Message-----
From: Andrea Lucchetti <andlucchett@...>
To: main@ap-gto.groups.io
Sent: Sat, Aug 1, 2020 7:51 am
Subject: [ap-gto] large alignment error with polemaster & mach2

Hello,
I need to polar align my Mach 2 very quickly to save time on field.
I thought Polemaster would have been a good choice but I cant get a good alignment with it (I am ways off)
The procedure goes very well, till the end, including the precise alignment step, but I have drift in my images.
running the Polemaster twice results in a small change.


I am not using the refraction calculation , as I leave at 42 deg latitude: can this be one of the reason?

my aim is to shoot 10 min subs unguided (@790mm focal and 1,6 arcsec/pixel resolution).

I still don't have my OTA ready so it is difficult for me to check with the drift method for the time being ( I can borrow a dslr and C8)

Would the RAPAS be a better solution for my needs? 
I understand it can be mounted on the MACH2 using a dovetail, with repeatable accuracy.
Is the accuracy enough for imaging and how it compares to Polemaster?

Thank you,
Andrea


Re: End of an era?

Roland Christen
 


Do you autograph all of the Stowaways ?
No, I did this one on my first prototype at NEAF a couple of years ago for a laugh.

Rolando


-----Original Message-----
From: Michael Hambrick via groups.io <mike.hambrick@...>
To: main@ap-gto.groups.io
Sent: Fri, Jul 31, 2020 10:35 pm
Subject: Re: [ap-gto] End of an era?

Nice work Roland

Do you autograph all of the Stowaways ?


Best Regards

Michael Hambrick
ARLANXEO
TSR Global Manufacturing Support
PO Box 2000
Orange, TX 77631-2000
Phone: +1 (409) 882-2799
email: mike.hambrick@...


Re: Planet Tracking and Imaging #Mach2GTO #APCC

Roland Christen
 

You would not see any motion at 30 seconds for any planet. However, in 30 seconds you will experience rotation on Jupiter, which is something else indeed.

Rolando



-----Original Message-----
From: Greg Vaughn <gregvaughn@...>
To: main@ap-gto.groups.io
Sent: Fri, Jul 31, 2020 10:33 pm
Subject: [ap-gto] Planet Tracking and Imaging #Mach2GTO #APCC

This is a question for Ray Gralak after watching his July 2016 video about Horizons again.  The question and/or response may be of interest to others as well.

Hi Ray,

in your Horizons video you mention downloading ephemeris data for Mars as an example of what Horizons can be used for - beyond tracking comets.  If I'm going to use the Mach 1 or Mach 2 to image Jupiter, Saturn or Mars, can I download ephemeris data for them in Horizons, do an APPM model and then reasonably expect to be able to track one of the planets with enough precision for good lucky (video) imaging.   Does it make a difference between the Mach 1 or Mach 2.   

I know there are some changes coming with the new keypad software, but the question is for an attempt to image the planets while they are still in my field of view and with a very long effective focal length (~5,700-11,400mm)  - using an 11in Edge HD and a barlow or PowerMate (2X-4X).  Using a ZWO ASI 174 OSC, the image scale would be about .212 to .106 arcsec/pixel while for the ZWO 1600MM it would be .138 to .069 - if I've calculated these correctly.  At any rate, they would need very accurate tracking during the length of the video which for Jupiter would be about 30sec if I remember correctly.

I've been focused on nebulae targets, but would like to shift scopes and catch the planets before they are gone. (I know I'm running a little late already.)

Thanks in advance for any insights from you on how best to leverage APCC for this task and any critiques on my thought process and setup.

Cheers,
Greg

p.s.  I'm limited in my views of the planets to the azimuthal range of about 110-185 deg true, so my APPM model is primarily an East model.


Re: large alignment error with polemaster & mach2

J. Belden
 

Andrea,

I have used the RAPAS for my AP1100 and now AP1600 pretty much since the RAPAS was offered to help setup in the field.  The only thing I do is setup using the RAPAS and verify accuracy with a drift alignment.  I could get some unguided images with my C14 f7 STL6303E setup periodically up to 5 mins on my AP1100 non encoder version using this method.  The RAPAS has been one of those must have tools if your setting up out in the field each night.
I currently setup and breakdown my AP1600, AGO 12.5", STXL6303E at my RV park using my RAPAS with excellent results.  I recommend to  check the alignment of the RAPA when you first get it, if you elect to buy one.  I get good unguided results with this setup as well up to 5 mins, maybe I could get more but I just autoguide for anything over 5 mins.

I did buy a Polemaster to test it out to see if it was more accurate but its still in the box because the AP900 adaptor doesn't seem to work for an AP1600.  So right now the RAPAS is still King for my needs.  One more quick observation is to make sure you look in the RAPAS centering you eye, otherwise I have noticed you can be off a little for adjustments.   

Anyone know offhand if the front cap on the AP1600 is larger than the AP1100?  My AP1100 is in WI and my AP1600 is with me in TX.  I'd still like to do a compare of the two, maybe I will try setting the Polemaster using a dovetail mounting.

Regards,

Joe B



Re: Planet Tracking and Imaging #Mach2GTO #APCC

Greg Vaughn
 

Hi Jim,

 

Thanks for your thorough and helpful response.   Your image of Saturn is spectacular and indicates that while I’m following a similar workflow to the one you described, I’m not getting the same kind of results.  Hence the reason I was searching for some improvement.

 

Since your results are so far superior, I’ve sent you a note directly, explaining my challenges in a little more detail and asking you to share some of your secret sauce.

 

Thanks again.

 

Cheers,

Greg

 


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Re: APPC refraction correction question

Dean Jacobsen
 

On Fri, Jul 31, 2020 at 08:47 PM, Craig Young wrote:
Looks like 3 arcs works very well, do you know if 2 arcs works?
Craig, I have been using three lines only.
 
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Dean Jacobsen
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Re: large alignment error with polemaster & mach2

Cheng-Yang Tan
 

Yes, I’ve used PM camera with SC. As long as SC can platesolve the image, it can calculate where to move the mount. 


Sent from Yahoo Mail for iPad

On Saturday, August 1, 2020, 8:41 AM, Andrea Lucchetti <andlucchett@...> wrote:

Hi, I Will check SC But it seems it works within a narrower fov. Did you try it with pole master camera right?
Thank you,
Andrea

Il giorno sab 1 ago 2020 alle 15:22 Cheng-Yang Tan via groups.io <cytan299=yahoo.com@groups.io> ha scritto:
PS, if you plan to use a guide scope rather than run unguided, SC works with your guide scope. And with higher magnification than the PM scope, SC should give an even better PA.


Sent from Yahoo Mail for iPad

On Saturday, August 1, 2020, 8:18 AM, Cheng-Yang Tan via groups.io <cytan299=yahoo.com@groups.io> wrote:

I’d suggest trying Sharpcap with the Polemaster camera. I’ve always found Sharpcap gives a better PA than the Polemaster software. An advantage of SC is that it gives an alignment error when you are adjusting alt and az which is absent in PM software.

Unfortunately, SC polar alignment costs $ and is an annual subscription, but it’s cheap.

As usual YMMV

cytan


Sent from Yahoo Mail for iPad

On Saturday, August 1, 2020, 7:51 AM, Andrea Lucchetti <andlucchett@...> wrote:

Hello,
I need to polar align my Mach 2 very quickly to save time on field.
I thought Polemaster would have been a good choice but I cant get a good alignment with it (I am ways off)
The procedure goes very well, till the end, including the precise alignment step, but I have drift in my images.
running the Polemaster twice results in a small change.


I am not using the refraction calculation , as I leave at 42 deg latitude: can this be one of the reason?

my aim is to shoot 10 min subs unguided (@790mm focal and 1,6 arcsec/pixel resolution).

I still don't have my OTA ready so it is difficult for me to check with the drift method for the time being ( I can borrow a dslr and C8)

Would the RAPAS be a better solution for my needs? 
I understand it can be mounted on the MACH2 using a dovetail, with repeatable accuracy.
Is the accuracy enough for imaging and how it compares to Polemaster?

Thank you,
Andrea

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