7 votes
Accepted

Which two satellites had a 44% probability of collision at 2017-01-07 21:53 UTC?

First of all, it was a miss. Whew! The close approach predicted at 21:53:00 UTC on 7 Jan 2017 has passed without incident. The JSpOC has confirmed that both satellites are being tracked as single ...
PearsonArtPhoto's user avatar
  • 121k
5 votes
Accepted

Establish if Payload is Still Operational - Space Track

(Many thanks to @Uhoh whose comments sent me off in the right direction) This data is available on CelesTrak's SATCAT Records API. Take ZARYA for example: https://celestrak.org/satcat/records.php?...
ScottishTapWater's user avatar
4 votes
Accepted

Is 18 Space Control Squadron (18 SPCS) which "detects, tracks, and identifies all artificial objects in Earth orbit" a part of Space Force?

Yes and Yes! The 18th SPCS (f.n.a "JSpOC") is a Part of the former "Air Force Space Command" (Wikipedia 18 Space Control Squadron). The AFSpC on the other hand became the "US Space Force" (AFSpC ...
CallMeTom's user avatar
  • 3,308
4 votes
Accepted

Why are there some NORAD catalog IDs larger than 80000 in space-track?

These are so called "Analyst" objects: Analyst objects are on-orbit objects that are tracked by the U.S. Space Surveillance Network (SSN) with insufficient fidelity for publication in the ...
Carlos N's user avatar
  • 4,444
3 votes

What is the probability of impact?

The equation for the distance between the two objects is simply the magnitude of the vector between their positions. Numerical root-finding is made easier by knowing the analytic derivative, which is ...
Ryan C's user avatar
  • 7,852
3 votes
Accepted

How can I find sources for Launch Trajectories?

It is going to be difficult to find precise data during the initial launch, however let's see what might be available: For SpaceX launches, their videos posted in their YouTube channel display ...
uhoh's user avatar
  • 149k
3 votes
Accepted

Get fully defined orbit from space-track.org SATCAT

Problem 1: you're querying the wrong database. For orbit data, you don't want SATCAT, you want ELSETs, which means you need to use "gp" (for General Perturbations) in your URL in place of &...
Ryan C's user avatar
  • 7,852
2 votes

How to access conjunction data message data?

CDMs on space-track.org are archived 72 hours after TCA. For basic orbital elements you should be able to pull the TLE for the secondary object identified in the conjunction. However, currently there ...
GiveMeSpace's user avatar
2 votes

What is the probability of impact?

The document https://www.space-track.org/documents/How_the_JSpOC_Calculates_Probability_of_Collision.pdf was written and posted in 2016. It discusses the process for the computation of probability of ...
Ken Kopke's user avatar
1 vote

How can I find sources for Launch Trajectories?

Unless you know someone working on the launch or landing team, you’ll be hard pressed to get the exact trajectory any time before the mission. However, it is often easy to find out the payload and ...
R Edgar's user avatar
  • 11

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