# How will Starlink satellites be capable of tracking on-orbit debris and autonomously avoiding collision?

The press kit for the first Falcon 9 Starlink launch and deployment of the first 60 satllites scheduled for May 15, 2019 says:

Starlink satellites are capable of tracking on-orbit debris and autonomously avoiding collision.

How can a small satellite "track" on-orbit debris? Instead, might they really mean keep track of the debris by using a regularly uplinked ephemeris?

• – uhoh May 15 '19 at 15:19

• Doing an search on $N \times (N-1) \approx N^2$ pairs for all conjunctions is a big job, but each satellite only needs to compute $N \times 1 \approx N$ pairs. I think this is extremely cool; solar-powered distributed computng conjunction calculations! Algorithmic methods or techniques to find conjunctions in high N Keplerian element ensembles? – uhoh May 17 '19 at 22:53