Discover and read the best of Twitter Threads about #SpaceDebris

Most recents (4)

To date, more than 5800 launches have resulted in over 44,000 tracked objects in orbit, of which more than 20,000 remain in space and are regularly tracked by surveillance networks around the globe
#SpaceDebris🛰️
~26% of catalogued objects are satellites, and only a small fraction of those - about 2000 - are still operating today
~17% of tracked objects are used upper stages of rockets and mission-related objects like launch adapters and lens covers
A drifting thermal blanket,📸1998
More than half of the #spacedebris population was generated by 500+ in-space break-ups. The two major fragmentation events are clearly visible as jumps in the graph:
2007: Chinese anti-satellite missile test
2009: Collision between Iridium 33 and Kosmos-2251 satellites
Read 9 tweets
For the first time ever, ESA has performed a 'collision avoidance manoeuvre' to protect one of its satellites from colliding with a 'mega constellation'
#SpaceTraffic
@esa This morning, @ESA's #Aeolus Earth observation satellite fired its thrusters, moving it off a collision course with a @SpaceX satellite in their #Starlink constellation
@esa @SpaceX @ESA_EO Experts in our #SpaceDebris team calculated the risk of collision between these two active satellites, determining the safest option for #Aeolus would be to increase its altitude and pass over the @SpaceX satellite
#CollisionAvoidance
Read 11 tweets
1/4
A brief thread. It is now 2.5 months after the Indian #ASAT test. How much of the #spacedebris generated is still in orbit, how much is gone?
92 larger debris pieces from the test have been catalogued so far. Half of those are still orbiting today.
2/4
According to the Indian Government forecast at the time of the test, the last debris pieces should have reentered 45 days after the test, i.e. a month ago. The reality is different. 45 days after the test, barely 30% of the tracked larger debris had reentered.
3/4
As mentioned, currently (June 15) some 50% of the larger, tracked debris pieces is still on orbit. This ~50% is in line with the forecast in my analysis here: thediplomat.com/2019/05/why-in…
Read 5 tweets
/1 Long thread with what we know so far about today's Indian #ASAT test, the #spacedebris #spacepolicy and #spacelaw implications, and the possible role of commercial space in enforcing norms
/2 India govt says the test took place at 300 km altitude and was against a live Indian satellite: reuters.com/article/us-ind…
/3 According to analysis by @TSKelso @DutchSpace and @Marco_Langbroek the target was likely Microsat-r (SATNO 43947, 2019-006A)
Read 22 tweets

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