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
2025-1252COSMOS 2251 DEBNORAD 35285 · 1993-036AJP · FragmentRussia—11 Jul 2025—Re-entered2025-1256COSMOS 2251 DEBNORAD 33890 · 1993-036CT · FragmentRussia—12 Jul 2025—Re-entered2025-1257COSMOS 2251 DEBNORAD 34342 · 1993-036PQ · FragmentRussia—12 Jul 2025—Re-entered2025-1258COSMOS 2251 DEBNORAD 34442 · 1993-036SK · FragmentRussia—12 Jul 2025—Re-entered2025-1311COSMOS 2251 DEBNORAD 33784 · 1993-036Z · FragmentRussia—29 Jul 2025—Re-entered2025-1312COSMOS 2251 DEBNORAD 34788 · 1993-036AAR · FragmentRussia—29 Jul 2025—Re-entered2025-1337COSMOS 2251 DEBNORAD 36424 · 1993-036AZX · FragmentRussia—6 Aug 2025—Re-entered2025-1395COSMOS 2251 DEBNORAD 35970 · 1993-036AVL · FragmentRussia—21 Aug 2025—Re-entered2025-1418COSMOS 2251 DEBNORAD 37500 · 1993-036BMD · FragmentRussia—30 Aug 2025—Re-entered2025-1499COSMOS 2251 DEBNORAD 38190 · 1993-036BSE · FragmentRussia—19 Sep 2025—Re-entered2025-1564COSMOS 2251 DEBNORAD 36435 · 1993-036BAJ · FragmentRussia—4 Oct 2025—Re-entered2025-1605COSMOS 2251 DEBNORAD 33931 · 1993-036EL · FragmentRussia—11 Oct 2025—Re-entered2025-1653COSMOS 2251 DEBNORAD 34951 · 1993-036AEE · FragmentRussia—21 Oct 2025—Re-entered2025-1667COSMOS 2251 DEBNORAD 35729 · 1993-036ARA · FragmentRussia—25 Oct 2025—Re-entered2025-1673COSMOS 2251 DEBNORAD 36419 · 1993-036AZS · FragmentRussia—26 Oct 2025—Re-entered2025-1690COSMOS 2251 DEBNORAD 33813 · 1993-036BE · FragmentRussia—31 Oct 2025—Re-entered2025-1691COSMOS 2251 DEBNORAD 39588 · 1993-036BUT · FragmentRussia—31 Oct 2025—Re-entered2025-1707COSMOS 2251 DEBNORAD 34958 · 1993-036AEM · FragmentRussia—6 Nov 2025—Re-entered2025-1745COSMOS 2251 DEBNORAD 36052 · 1993-036AXP · FragmentRussia—16 Nov 2025—Re-entered2025-1766COSMOS 2251 DEBNORAD 34390 · 1993-036QF · FragmentRussia—20 Nov 2025—Re-entered
1,101 entries · page 53 of 56
Other break-ups