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Creating objects with clones (Read 1025 times)
Tony
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Creating objects with clones
10/17/15 at 12:53:15
 
Instructions for "Create Objects with Clones"
I'm not sure if the "Create Object with Clones" works properly.  I don't know how to test it against a known data set.  But assuming it works correctly, here's how to use it:
 
You need to get the values of a covariance matrix for a particular asteroid.  Since copying and pasting 36 numbers is time-consuming, Gravity Simulator lets you paste the entire array if you got it from the JPL site.
Here's a YouTube video I made showing how to create 50 clones around newly-discovered 2015 TB145.  This large asteroid will pass about 1.5 lunar distances from Earth on Halloween this year.
 
The YouTube also shows you how to view this asteroid from Earth against a background of stars.
This shows the view from Geocenter.  If you like, you can further refine your sky by choosing your city from the "Cities A" interface under the "Display" menu.
 
YouTube:  https://www.youtube.com/watch?v=ZvoUmoYC_PY
 
To follow along, start with this version of Gravity Simulator: http://orbitsimulator.com/gravitySimulatorCloud/simulations/gsim20151016.html
 
Here is the JPL page for obtaining covariance matrices: http://ssd.jpl.nasa.gov/sbdb.cgi
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