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2012 DA14 script for Stellarium?

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#1 socialoutkast

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Posted 05 February 2013 - 08:08 AM

Does anyone out there have a script to add 2012 DA14 to Stellarium? I know it will be a fast mover and want to get a good idea where to point the binoculars on 2/15

#2 BSJ

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Posted 05 February 2013 - 01:15 PM

Press F2, to get into the “Configuration window”. Click on the Plugins Tab.

Click “Solar System Editor” and then the configure button.

Then click the “Solar System” tab.

Once there click the “Import orbital elements in MPC format…” button.

Make sure “asteroids” is selected. Click the “Select bookmark…” button. Pick the NEA bookmark.

Then click “Get orbital elements.” Search for 2012 DA14 if it’s not near the top. Check mark it and click add objects.

Close all the config pop-ups.

Close and re-start Stellarium just to make sure the data is fully/correctly loaded.

Should be be loaded now.

#3 btschumy

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Posted 06 February 2013 - 01:06 PM

I'm not totally sure how Stellarium computes solar system object positions, but my guess is it is based on a simple Keplarian orbit based upon the latest orbital elements. This will *not* provide very useful information for a near-Earth flyby. Most planetarium programs suffer from this limitation.

The Earth profoundly perturbs the orbit as the object gets close and any predictions will be way off. You really need to compute the orbit by numerically integrating the differential equations, solving the n-body problem.

The solution is to download an ephemeris from JPL that is actually based upon such computations. Only then will you get an accurate predictions.

Note: getting the latest orbital elements a few hours before flyby will help. Then the path may be fairly accurate, but the timing will generally be off.

#4 socialoutkast

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Posted 08 February 2013 - 10:58 AM

Thanks It worked. I was not aware of this feature,previously we would get scripts for these from the net or these forums.

#5 BSJ

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Posted 08 February 2013 - 11:05 AM

Yep, way better than the old way.

Works for Comets too...

#6 Edward E

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Posted 11 February 2013 - 03:14 PM

Cool.

#7 Edward E

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Posted 11 February 2013 - 03:17 PM

:twitch: My brain...it's melting, melting! O what a world, what a world.................






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