Jump to content

Stargazers Lounge Uses Cookies

Like most websites, SGL uses cookies in order to deliver a secure, personalised service, to provide social media functions and to analyse our traffic. Continued use of SGL indicates your acceptance of our cookie policy.

stargazine_ep34_banner.thumb.jpg.28dd32d9305c7de9b6591e6bf6600b27.jpg

Recommended Posts

Hey Guys, 

I run a Youtube Channel and as part of that I like to live stream the telescope.  But the problem is lack of consistency.

Equipment:

Orion EON 110, Meade 10" SCT

Orion Mount - Exos2-PMC. Meade Mount 'push to' alt az with clockwork drive

APT, SharpCap, PHD2, Stellarium, ASCOM Hub

Focal Lengths Orion 660mm, Guide Scopes 188mm, SCT 2500mm

Powered USB for ZWO cameras (120 and 294)

 

Here is what happens:

Cameras, sometimes work, sometimes don't.  I am not making the mistake of trying to get APT and SharpCap to view the same camera.  I used APT for the guide scope and SharpCap for the main tube and the 294.  Sometimes APT will take an image, sometimes it will do live view, sometimes both, sometimes neither.  It is very distracting to the stream to spend an HOUR turning the computer off and on, plugging, unplugging and replugging the cameras just to get them to image.

When I do get an image it plate solves at the NCP, but if you move away, setting the coordinates to the scope position or the object I am looking at, it doesn't consistently plate solve.  Sometimes it does, sometimes not.  It is completely irregular and can change within a session.

Not all three plate solving means even work, for blind solve, 

ASTAP never seems to work, either in point craft or locally stand alone

PS2 and ASPS work intermittently, as above

I did download all the catalogs and they are in the default directories.

This is very frustrating and I was wondering if anyone else is having this issue or has suggestions.

Bob

Share this post


Link to post
Share on other sites

What iso are you using for blind solving, using APT i find iso 1600 works well with a  6 sec exposure and use the ASTAP option usually blindsolving in about 4 sec and have the G18 star catalogue installed , I would ask @han59 for help with Astap settings I’m sure there’s a setting that needs tweaking  I use a 350 and a 1000 mm fl scopes .

 

 

Edited by bottletopburly

Share this post


Link to post
Share on other sites

You shouldn't plate solve at the NCP especially if your platesolving is syncing the telescope position, as a minor error in RA positioning may generate a very large RA error when syncing, as at the NCP any RA position is actually correct, and one half of the image is effectively rotated 180 degrees compared to the other half, so establishing image rotation is more a matter of opinion rather than a useable value. 🙂

Alan 

Share this post


Link to post
Share on other sites
1 hour ago, Bob_the_Science_Guy said:

Not all three plate solving means even work, for blind solve, 

ASTAP never seems to work, either in point craft or locally stand alone

Provides us with a test image for further investigation. E.g. upload it to nova.astrometry.net and give the link.

 

- You should see 30 or more stars on the image.  Longer exposure time helps. With a F/5 system a few seconds is enough but for long focal lengths maybe up to 30 seconds is required.

- Don't bin too much. Keep dimensions equal or above 1280x960 pixels.

 

Han

  • Like 1

Share this post


Link to post
Share on other sites
2 hours ago, Bob_the_Science_Guy said:

As a side note, SharpCap does a great job with polar align, but will not plate solve at all.  Am I missing a setting?

Bob

I think the default will only platesolve within 15 degrees. 

Share this post


Link to post
Share on other sites
1 hour ago, symmetal said:

You shouldn't plate solve at the NCP especially if your platesolving is syncing the telescope position, as a minor error in RA positioning may generate a very large RA error when syncing, as at the NCP any RA position is actually correct, and one half of the image is effectively rotated 180 degrees compared to the other half, so establishing image rotation is more a matter of opinion rather than a useable value. 🙂

Alan 

I've heard that, but the problem is last night that was the ONLY location that would plate solve.  I tried M31 and a number of other areas first after polar alignment.

Just irritating when things don't work, I'm trying to figure out if I did anything to change it, but it goes back and forth in the same session without any changes.  I've moved all the plate solving software to its own folder in the C drive, I'll see if that helps as I've seen some folks report problems having it in the 'windows' folder.

 

Bob

Share this post


Link to post
Share on other sites
2 hours ago, bottletopburly said:

What iso are you using for blind solving, using APT i find iso 1600 works well with a  6 sec exposure and use the ASTAP option usually blindsolving in about 4 sec and have the G18 star catalogue installed , I would ask @han59 for help with Astap settings I’m sure there’s a setting that needs tweaking  I use a 350 and a 1000 mm fl scopes .

 

 

I don't use an iso, that only comes into play with the Canon.  I'm using ZWO 120 and 294, the 120 is on the guide scope.  I use 50% gain and 4 second exposures with stretch.

Bob

Share this post


Link to post
Share on other sites
3 hours ago, Bob_the_Science_Guy said:

I used APT for the guide scope and SharpCap for the main tube and the 294. 

Shouldn’t you be platesolving off the imaging camera, why would you need to pltesolve off the guide scope I only platesolve off guidescope when used with polar aligning using sharpcap pro 

Share this post


Link to post
Share on other sites
2 hours ago, bottletopburly said:

Shouldn’t you be platesolving off the imaging camera, why would you need to pltesolve off the guide scope I only platesolve off guidescope when used with polar aligning using sharpcap pro 

My guide scope and main tube are aligned, so it is a matter of preference.  Using the guide scope works just fine when platesolving is working.  Center the target in the guide scope and it is in view of the main scope.

Bob

  • Like 1

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Recently Browsing   0 members

    No registered users viewing this page.

  • Similar Content

    • By Sidecontrol
      Hi, 
      So I've got EQMOD set up, APT and Sterallium, all working fine.  Problem is APT doesn't support fuji cameras, and whether I pick APT or Sterallium to go to an object I'm finding i still have to do a bit of slewing to get it bang on the target (not much, but a little). I've also got PHD2 set up too and working. 
      Is there any other ways I can plate solve with these programs or is there another program I can use?
      Cheers,
      Mark
    • By Sidecontrol
      Hi there,
       
      So I've finally gotten round to setting up APT and Sterallium (via ASCOM) on my laptop for controlling my mount EQM 35 pro. (I got PHD2 working on it a while back).  I followed a tutorial on youtbe about doing this using simulators in Sterallium, when doing this pressing control + 1 on the keyboard moves the simulated telescope and everything seems to update in ATP and work fine.
       
      The (small) problem I'm having is when i successful connect my own mount in Sterallium (after doing the same in APT) I click on an area and then press the short cut Ctrl + 1, nothing happens, my yellow telescope icon doesn't move to the location, but when I do it in APT, sterallium obviously updates to show the new position.
       
      Any idea why the short cut in Sterallium isn't working when connected to my mount?
       
      Cheers,
      Mark
    • By AstroM1
      Nikon D5100 + WO ZS73 II Star Adventurer Pro 150 x 30 sec + DOF
    • By stargamed
      I recently got an Orion StarShoot Astrophotography Camera and have had difficulty getting it
      to work right. The software that comes with it AstroCap seems horrible. The start/stop mechanisms
      are vague, the images won't appear. The best I've been able to do is see scan lines and some
      color light or dark variations on the screen after messing with the exposure and the gain.
      Popping the camera into the reflector or the refractor telescope yields nothing. I'm told
      there is other software that is better supported and more current including SharpCap
      and NINA. However so far neither of those recognize my StarShoot with the ASCOM
      drivers loaded. 
      Can someone tell me precisely what drivers I need to get the Option Starshoot (the original)
      to work with SharpCap NINA or some other software? A link would be much appreciated.
      What I downloaded from Orion have been AllInOneDrivers.ZIP AllInOneASCOM.ZIP and
      ASCOMPlatform 6.1 and later 6.5. The only software where I'm able to deliver even 
      a poor image to the laptop has been AstroCap. Or if there's a new and improved 
      AstroCap beyond 1.3.9 do tell!
    • By SStanford
      Hi All,
      For what has seemed like forever, the clouds finally parted late last night and the Orion constellation was very clear from my balcony.
      I had a brief window of opportunity earlier this week and had difficulty focusing on stars at all using my DSLR (Canon 450D) and APT. 
      Last night was a breakthrough; I was able to capture starlight in APT liveview and even bring the stars into (significantly better) focus!
      I now face my next challenge; I am unable to focus sharply on any of the stars.  Using my telescopes focusing wheel I seem to get only blurry spots of light coming through, despite very carefully adjusting the wheel for quite some time.
      At the risk of embarrassing myself, I've attached the images of Rigel and Betelgeuse I captured last night (on both long and short exposures, details of ISO and exposure are detailed in the image titles). This is as sharp as I can them.
      Is there anyway I can fine tune the focus? I've seen AP videos on Youtube where jam jar lids have been glued to the focus wheel or motorized focusers attached. Are these gimmicky or do they make a significant difference?
      I should mention that I don't yet have a tracking mount:  I've eyed the Skywatcher AZ-GTI wi-fi as good candidate for my first meaningful mount (with the EQ wedge coming shortly after).  Having emailed a number of retailers it seems these are in very short supply, here's hoping stock replenishes post-Christmas! I think this will let me get to grips with the equipment I have right now, definitely would like to get a sharper image, even if I'm only capturing star trails.  
      to capture the images shown below I used:
       - Celestron 100AZ (100mm Aperture, 660mm focal length)
       - Canon 450d 
       - Barlow lens x2 (Celestron)
       - APT (connected DSLR directly to laptop via USB)
       - Stock Celestron Alt-Az Mount
      All the best.
      Single__0049_ISO400_0s4s__20C.CR2 Single__0034_ISO1600_30s__20C.CR2 Single__0027_ISO1600_30s__20C.CR2 Single__0012_ISO1600_1s__20C.CR2 Single__0011_ISO1600_30s__20C.CR2
×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.