Break-up record
Cosmos 2251
On 10 February 2009 the retired Russian satellite Cosmos 2251 collided with the working communications satellite Iridium 33, the first accidental collision between two intact satellites. 1,101 of its fragments are now entered in the Orbital Register.
1,101
Fragments on record
10 Feb 2009
Break-up
15 Dec 2015
Half down by
30 Aug 2026
Latest to come down
608
Still in orbit
Fragments coming down, month by month
Bars: per month · line: share of the cloud downFragments re-entered that monthShare of all 1,101 on record
The fragments
Every fragment on record
Each fragment has its own register entry and permanent number. Fragment pages are kept out of search results; this page carries them.
Entry no.ObjectCountryLaunchedEnded (UTC)In orbitHow it ended
PendingCOSMOS 2251 DEBNORAD 35796 · 1993-036ASS · FragmentRussia—16 Mar 2026—Re-enteredPendingCOSMOS 2251 DEBNORAD 37085 · 1993-036BFF · FragmentRussia—23 Mar 2026—Re-enteredPendingCOSMOS 2251 DEBNORAD 34313 · 1993-036NK · FragmentRussia—3 Apr 2026—Re-enteredPendingCOSMOS 2251 DEBNORAD 39111 · 1993-036BUA · FragmentRussia—7 Apr 2026—Re-enteredPendingCOSMOS 2251 DEBNORAD 34886 · 1993-036ACZ · FragmentRussia—12 Apr 2026—Re-enteredPendingCOSMOS 2251 DEBNORAD 34010 · 1993-036GV · FragmentRussia—16 Apr 2026—Re-enteredPendingCOSMOS 2251 DEBNORAD 34464 · 1993-036TH · FragmentRussia—26 Apr 2026—Re-enteredPendingCOSMOS 2251 DEBNORAD 34859 · 1993-036ACD · FragmentRussia—13 May 2026—Re-enteredPendingCOSMOS 2251 DEBNORAD 47061 · 1993-036BXR · FragmentRussia—8 Jun 2026—Re-enteredPendingCOSMOS 2251 DEBNORAD 35451 · 1993-036AKV · FragmentRussia—17 Jun 2026—Re-enteredPendingCOSMOS 2251 DEBNORAD 37133 · 1993-036BHF · FragmentRussia—25 Jun 2026—Re-enteredPendingCOSMOS 2251 DEBNORAD 40237 · 1993-036BVS · FragmentRussia—12 Jul 2026—Re-enteredPendingCOSMOS 2251 DEBNORAD 37966 · 1993-036BPR · FragmentRussia—15 Jul 2026—Re-enteredPendingCOSMOS 2251 DEBNORAD 35901 · 1993-036AUQ · FragmentRussia—21 Jul 2026—Re-enteredPendingCOSMOS 2251 DEBNORAD 47059 · 1993-036BXP · FragmentRussia—23 Jul 2026—Re-enteredPendingCOSMOS 2251 DEBNORAD 33901 · 1993-036DE · FragmentRussia—29 Jul 2026—Re-enteredPendingCOSMOS 2251 DEBNORAD 40223 · 1993-036BVC · FragmentRussia—1 Aug 2026—Re-enteredPendingCOSMOS 2251 DEBNORAD 34410 · 1993-036RB · FragmentRussia—16 Aug 2026—Re-enteredPendingCOSMOS 2251 DEBNORAD 36470 · 1993-036BBV · FragmentRussia—19 Aug 2026—Re-enteredPendingCOSMOS 2251 DEBNORAD 34383 · 1993-036PY · FragmentRussia—26 Aug 2026—Re-entered
1,101 entries · page 55 of 56
Other break-ups