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MegaStar comet issue

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#1 Tom Laskowski

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Posted 05 August 2014 - 06:52 PM

I just uploaded the latest comet elements for MegaStar from: http://www.minorplan...wareComets.html and am getting an error in trying to run the program. There appears to be a bug with the elements format. The error window keeps popping up showing the message: "Unable to compute coordinates. No convergence"

 

It happens on my Windows XP and Windows 7 computers. I'm running MegaStar version 5.0.14

 

Has anyone encountered this? Any ideas?

 

Thanks



#2 johnpd

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Posted 06 August 2014 - 04:50 AM

Do you have an older file that you can compare to?

 

JohnD



#3 Tom Laskowski

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Posted 06 August 2014 - 07:29 AM

I did check against an older comet.txt file and the older one worked fine. I edited the new comet.txt file by deleting about the last half of the file and it also worked, so I suspect there is a "bad" comet element in there somewhere. I also tried manually adding a comet then I checked the txt file and it looked to be in the correct format. At this point I can probably just edit the file to have it contain only the comets I am interested in observing.



#4 Tom Laskowski

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Posted 07 August 2014 - 12:19 PM

Something is wrong with this element. I deleted this line from comet.txt and the program now seems to work fine.

 

SOHO                          P/2010 H3   2015 09  25.7864    0.046924   0.984813     24.8193     78.3744     23.9242   20.0    5.0    2000 MPC 70361



#5 johnpd

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Posted 08 August 2014 - 12:10 AM

Something is wrong with this element. I deleted this line from comet.txt and the program now seems to work fine.

 

SOHO                          P/2010 H3   2015 09  25.7864    0.046924   0.984813     24.8193     78.3744     23.9242   20.0    5.0    2000 MPC 70361

That's strange. I looked at it in Hex with a text editor and could not see anything weird unless it was fixed before I downloaded it.

 

JohnD



#6 Retsub

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Posted 12 August 2014 - 10:44 PM

Many thanks to Tom and JohnD for getting to the bottom of this problem.  I am not a strong user of Megastar but many of my friends are.  One friend had the same error when doing some comet work and he asked me.  I know for many others that Megastar may be a bit dated but it is still a solid work horse to use. A quick forward about your results and he is now happy as ever.  Thanks.    *BW*



#7 Alan French

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Posted 01 January 2015 - 10:20 PM

I had problems tonight with a new comet file for Megastar. Deleting SOHO 2010/H3 from comet.txt still fixes the problem.

 

Clear skies, Alan



#8 calskywatcher

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Posted 23 August 2015 - 06:43 PM

I was happy to find this discussion as I encountered the same problem with the download I did today.  However, I am still getting the errors after deleting SOHO 2010 H3.   My guess is that a more recent listed comet has some unknown errors.  Based on the date of Alan's comment, I did a List/Locate Comets on every non-periodic comet in 2015 (actually back to C/2014 W9 PANSTARRS).  I also walk back the periodioc coments to 250P.  My assumption is that the problem comet would generate the message when I tried to locate.  However, I could not find another comet that could not be found.   Should anyone figure out the new problem elements, please post here!



#9 rmollise

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Posted 24 August 2015 - 09:21 AM

I've had various problems with Megastar on modern OSes, and I have finally, alas, thrown in the towel on the program I used to love so much. It's still on my hard drive, but maybe not for long. I've switched to using TheSky 6 Professional for planetarium software type tasks and am now only about five years behind the power curve. :lol:

#10 Tom Laskowski

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Posted 30 August 2015 - 10:25 PM

I just now delete all the SOHO elements and it seems to fix the problem.



#11 CCD-Freak

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Posted 01 September 2015 - 09:05 PM

I just downloaded the latest ephemerides file and deleted the SOHO entry and my MegaStar 5 works fine now.

 

 

John

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