Results 1 to 8 of 8

Hybrid View

  1. #1
    Join Date
    Jul 2010
    Posts
    338

    Default Gemini went awry tonight

    I'm not sure where to put this post because I don't really know if this is a Gemini or ACP problem. Two nights ago I ran a plan and it worked to perfection. It opened the roof and slewed to M76 and carried out my plan and plate solves worked great. At the end of the session it shut down actually due to a weather alert but that's ok. Tonight I go to run the same plan again but I see from inside the house the first plate solve fails. I go out to the observatory and the scope is pointing at the wall of the observatory. ????

    It seems that the ra time is out by a little over four hours from it's correct position. I cleared the pointing model and synced on a star and it wanted to go off to somewhere way off for the next slew. One thing I notice is that the Gemini driver reports the opposite of what ACP sees when it states what side of the meridian it's pointing. This has got to be involved with the problem but I checked in ACP and Gemini and the time, location and date are correct.

    I don't understand what would cause this. Posting the log will just say that the plate solve failed. I'm hoping someone using and MI-250 and Gemini can help here. I was just bragging about how everything for the first time went perfect two nights ago and now this.

  2. #2
    Join Date
    Jul 2010
    Posts
    338

    Default

    I just checked the time in RA on Gemini and at local sidereal time of 15:00 it should be 03:00 at due north right? Well pointing north I'm reading 20:50 at park so it's off by about 6+ hours. It seemed to do this on it's on since two days before. Any ideas?

  3. #3
    Join Date
    Oct 2005
    Location
    Mesa, AZ
    Posts
    28,216

    Default

    I can't put a picture together from what you're saying.
    ... the time in RA on Gemini and at local sidereal time of 15:00 it should be 03:00 at due north right?
    I can't understand this, sorry.
    -- Bob

  4. #4
    Join Date
    Nov 2005
    Location
    Virgil, NY
    Posts
    5,021

    Default

    Bob, What Joel means is that if the LST is 15 hours (that's HA = 0h, on the south-facing meridian), then if the telescope is pointing north (and aimed below the pole), then that HA = 12h, and the RA is therefore 3 hours. His actual reading is RA = 20h 50m, so his readout is in error by 6h 10m.
    Dick
    www.VirgilObservatory.us
    Pier-mounted Meade 12-inch SCT "classic"
    w. focal reducer to f/5.3 ~ FL 1630mm
    Optec TCF-S focuser
    SBIG CFW-8A and ST7-XME
    FOV ~ 15' x 10'
    H-alpha, BVRI, RGB & Clear filters
    MaxIm and, of course, ACP!
    AAVSO Code: BRIC

  5. #5
    Join Date
    Oct 2005
    Location
    Mesa, AZ
    Posts
    28,216

    Default

    Oh, I get it now! Sorry, I was so focused today on a huge change to ACP.exe (all of the ActiveX interfaces changed their GUIDs and member IDs, affecting Scheduler and a few other things)... I didn't devote enough brain power to Joel's message.
    -- Bob

  6. #6
    Join Date
    Oct 2005
    Location
    Mesa, AZ
    Posts
    28,216

    Default

    This is 99% certain to be a Gemini setup problem. I'm going to have to defer to someone who is a Gemini expert. Are you running the current Gemini ASCOM driver (from the ASCOM Telescope Drivers download area)?
    -- Bob

  7. #7
    Join Date
    Jul 2010
    Posts
    338

    Default

    I changed the battery out on the Gemini, it was about 1.5 years old and tonight it would plate solve after an initial sync. Not sure if it was the battery but that's as good a guess as any at this point. It was just puzzling how two nights after a perfect run it did this.

    I think one thing about the RA is if it's pointing towards Polaris then the RA lines are closer together so that may account for the difference but it seemed large to me. It hit the plate solves tonight and the RA/DEC readings were correct.

    Thanks everyone, I'll keep an eye on it.

  8. #8
    Join Date
    Oct 2005
    Location
    Mesa, AZ
    Posts
    28,216

    Default

    OK, we'll call this a Gemini problem. I'll move the thread now.
    -- Bob

 

 

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Gemini Park not working
    By Paul Shulins in forum Hardware/Software/Driver Topics Not Directly Related to Our Software
    Replies: 4
    Last Post: Dec 19, 2011, 19:10
  2. Gemini Flipping
    By Erik Young in forum Hardware/Software/Driver Topics Not Directly Related to Our Software
    Replies: 26
    Last Post: Jan 27, 2010, 04:34

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •