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INDI Library v2.0.6 is Released (02 Feb 2024)

Bi-monthly release with minor bug fixes and improvements

Scope Swap now Plate Solving Issues

  • Posts: 30
  • Thank you received: 8
I swapped out my scope for a narrower FOV. I used this combo a year ago with NO issues.

Gear used:SW 8" Quarttro (f/3.9), ZWO ASi183MM Pro, SM version 1.7.0 (32 bit).

Everything works except the Plate solving. FOV is correct, camera correct....... What doesn't work is plate solving. I get a message "Not enough stars to solve". For the first time I attempted to start "Log", but that doesn't work either!

I have all the index files that I used last year.
1 year 10 months ago #82360

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Hi

have you tried solving the fits file using say astap on your pc or astrometry online? The file used by the alignment tab will be in /tmp and have a name matching solve*.fits. As it’s /tmp thus will probably have got cleared out if you’ve restarted since (I’m basing this on my experience with linux on my astroberry)

regards

Nigel
1 year 10 months ago #82362

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Last time this occurred to me, the issue was simply poor focus. Although I could see recognisable stars, the fainter ones were not discernible and the larger ones were small donuts. Sometimes it is a catch 22. You need to align to a star to focus, but it's hard to align until you are in focus.
1 year 10 months ago #82363

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Did you have a narrow-band filter in front of the camera?
Did you try bin 2x2 and increasing the camera gain?
Do you see stars in the fits viewer?
1 year 10 months ago #82390

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Yes Ron, I tried both the Ha and Lum filters at 1x1, 2x2 and 3x3) Even at 2x2 with a 15 second exposure I had all sorts of stars in the fits view. I even tried a old OS (v1.6.2) and it still wouldn't solve with the same response "Not enough stars to solve".

Since I last tried it under a good imaging sky, the weather has turned miserable. I haven't seen the Sun or a star in 12 days now! Snow and clouds dominate the sky!
Last edit: 1 year 10 months ago by Brent.
1 year 10 months ago #82391

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Questions about what you've tried? I'm sure you probably have these covered...

Good focus - tested with a bahtinov mask?
Are the stars pin-point at 100% zoom with your exposure?
Did you try the (large scale and) small scale stellarsolver model alternatives?
Are you indexes now appropriate for this FOV?

Cheers
1 year 10 months ago #82392

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Im having similar issues after swapping out my 71mm/f4 refractor (WO GT71) rig to a 152mm/f10 SCT (Meade 6" LX65 OTA ACF).
Both rigs use OAG with primary cam ASI533MC (OSC). Both rigs autofocus well.
I ensured all index files needed and recommended are available. Tried each of the 4 options profiles but did not alter
any for the scale & position or align options profiles editor settings. Plate solve success is hit and miss. M3 or M13, no problem
but bright stars such as Mizar will not solve accurately or not at all even after prior successful solves for different targets as part
of building a mount model.
1 year 9 months ago #82778

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