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How Do I Correct The RA/DEC Coordinates For Comet C/2019 Y4 Atlas? (Answer: Settings > Solar System > Update Minor Body Orbit Data)

Sergio Paganoni

April 02, 2020 20:36

Answered

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RA/Dec for C/2019 Y4 seems to be off.

See the difference between SkySafari 6 coordinates and theskymap.com coords: https://imgur.com/9vCHVaO

 

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3 comments

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  Pedro Braganca April 02, 2020 21:33

  Hi Sergio, we get the coordinates right from the Minor Planet Center.  Ensure you download the latest data.  If you have SkySafari Plus or Pro you can do this by going to Settings-Solar System and then scroll down to the bottom to update.  If you have SkySafari (basic) - the data is updated automatically once a week.  Active comets can change path in a short time and different software might report positions slightly different.  I'll look deeper into it however.

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  Sergio Paganoni April 04, 2020 08:57

  Hi Pedro,

  Thanks a lot for the prompt answer, even with the freshly updated data (i have Pro) it seems to be off around 2 min for RA and 3' for DEC. Do you also experience the same? Also Venus RA/DEC differs by 1min RA and 3' DEC. Are this considered "normal" errors?

  Thanks 

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  Pedro Braganca April 04, 2020 11:38

  Hi Sergio, both SkySafari and Starry Night report the same coordinates for these objects.  I think it's challenging comparing it with other websites - i can't validate their data.  In either case, the difference is so small that it won't affect observation.  I did create a ticket for us to look into it however.