I'm trying to determine which orbital object will have the most close calls with another object. I've gotten the full TLE catalog from Space-Track.org, and using poliastro python package have converted them all into Orbit objects so I have all the relevant orbital data, but now I'm at a loss for how to compare orbits with each other to see if they get close enough (ignoring actual position, just wondering how close in km the orbital paths get). I believe this will take a little over 171 million calculations, but I have time to let it run for a while. Thanks!

  • $\begingroup$ What distance do you consider “close”? If that’s like 10 km, you can simplify the problem a lot. $\endgroup$ Jan 2, 2020 at 1:07
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    $\begingroup$ See this Q&A for some relevant discussion. $\endgroup$
    – Chris
    Jan 2, 2020 at 3:19
  • $\begingroup$ For this initial pass I'd be happy with a "within 20 km" metric, and then deal with fine tuning it once I have those results. $\endgroup$
    – Adam Kall
    Jan 2, 2020 at 15:18


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