Jonathan McDowell
Astronomer at the Harvard-Smithsonian Center for Astrophysics; keeps Jonathan's Space Report, the record of what is actually in orbit and what came down.
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Where they publish
Site Jonathan's Space Report His catalogue and report on launches, satellites and re-entries.
The reference people use for what is in orbit: every launch, every payload, every re-entry, kept by hand since 1989.
Link verified 20 Sept 2026.
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