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Hugh Lewis Profile picture
Hugh Lewis
@ProfHughLewis
Member of the Astronautics Research Group at the University of Southampton with interests in space debris, NEOs, modelling and AI. Also a #pwME

Dec 11, 2019, 9 tweets

Always a highly: Darren McKnight now talking about intact derelicts in LEO #orbitaldebris2019

If two SL-16s collide, we will still be able to get to and use LEO, but that event will reduce the lifetime of all satellites within about 300 km by 10% [okay, he has the attention of the audience immediately]

*always a HIGHLIGHT

Darren has identified new clusters of intact derelicts in LEO as of 20 October 2019 below 650 km (at 615 km).

80% of mass in LEO was left there between 1980 and 2000

Darren considered objects above 700 kg for the clusters

"The only generalisation that is true is that no generalisation is true."

New cluster at 615 km: 25% added in last 25 years and is by far the youngest on average

Darren has initiated a study involving participants from across the globe to look at the statistically most concerning objects in LEO. Results to be presented at the IAC in 2020.

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