Iridium satellite constellation
Defunct satellites
Over the years a number of Iridium satellites have ceased to work and are no longer in active service, some are partially functional and have remained in orbit whereas others have tumbled out of control or have reentered the atmosphere.

Iridium satellite constellation

Section Title: Defunct satellites
Table Section Text: Over the years a number of Iridium satellites have ceased to work and are no longer in active service, some are partially functional and have remained in orbit whereas others have tumbled out of control or have reentered the atmosphere.

List of defunct Iridium satellites previously in operating service

Satellite	Date	Replacement	Status

Iridium 2	?	?	Uncontrolled orbit

Iridium 73	~1998	Iridium 75	Uncontrolled orbit

Iridium 48	May 2001	Iridium 20	Decayed May 2001

Iridium 9	October 2000	Iridium 84	Decayed March 2003

Iridium 38	September 2003	Iridium 82	Uncontrolled orbit

Iridium 16	April 2005	Iridium 86	Uncontrolled orbit

Iridium 17	August 2005	Iridium 77	Uncontrolled orbit

Iridium 74	January 2006	Iridium 21	In orbit as spare

Iridium 36	January 2007	Iridium 97	Uncontrolled orbit

Iridium 28	July 2008	Iridium 95	In orbit

Iridium 33	February 2009	Iridium 91	Destroyed February 2009 (Collided with Kosmos 2251)

Iridium 26	August 2011	Iridium 11	In orbit

Iridium 7	July 2012	Previously Iridium 51*	Failed in orbit

Iridium 4	2012	Iridium 96	In orbit

Iridium 29	Early 2014	Iridium 45	In orbit

Iridium 42	August 2014	Iridium 98	Uncontrolled orbit

Iridium 63	August 2014	Iridium 14	In orbit

Iridium 6	October 2014	*Iridium 51	Decayed 23 December 2017

Iridium 57	May 2016	Iridium 121	Observed drifting from nominal position

Iridium 39	June 2016	Iridium 15	In orbit

Iridium 74	June 2017	(spare)	Decayed June 2017

Iridium 30	August 2017	Iridium 126	Decayed September 2017

Iridium 77	August 2017	Iridium 109	Decayed September 2017

Iridium 8	November 2017	Iridium 133	Decayed 24 November 2017

Iridium 34	December 2017	Iridium 122	Decayed 8 January 2018

Iridium 43	Decayed 11 February 2018	Iridium 111	Decaying orbit

Iridium 3	Decayed 8 February 2018	Iridium 131	Decaying orbit

Iridium 21	Decayed 24 May 2018	Decayed

Iridium 37	Decayed 26 May 2018	Decayed

Iridium 68	Decayed 6 June 2018	Decayed

Iridium 67	Decayed 2 July 2018	Decayed

Iridium 75	Decayed 10 July 2018	Decayed

Iridium 81	Decayed 17 July 2018	Decayed

Iridium 65	Decayed 19 July 2018	Decayed

Iridium 41	Decayed 28 July 2018	Decayed

Iridium 80	Decayed 12 August 2018	Decayed

Iridium 18	Decayed 19 August 2018	Decayed

Iridium 66	Decayed 23 August 2018	Decayed

Iridium 98	Decayed 24 August 2018	Decayed

Iridium 76	Decayed 28 August 2018	Decayed

Iridium 47	Decayed 1 September 2018	Decayed

Iridium 12	Decayed 2 September 2018	Decayed

Iridium 50	Decayed 23 September 2018	Decayed

Iridium 40	Decayed 23 September 2018	Decayed

Iridium 53	Decayed 30 September 2018	Decayed

Iridium 86	Decayed 5 October 2018	Decayed

Iridium 10	Decayed 6 October 2018	Decayed

Iridium 70	Decayed 11 October 2018	Decayed

Iridium 56	Decayed 11 October 2018	Decayed

Iridium 15	Decayed 14 October 2018 (Over No. Pacific)	Decayed

Iridium 20	Decayed 22 October 2018	Decayed

Iridium 11	Decayed 22 October 2018	Decayed

Iridium 84	Decayed 4 November 2018	Decayed

Iridium 83	Decayed 5 November 2018	Decayed

Iridium 52	Decayed 5 November 2018	Decayed

Iridium 62	Decayed 7 November 2018	Decayed

Iridium 31	Decayed 20 December 2018	Decayed

Iridium 35	Decayed 26 December 2018	Decayed

Iridium 90	Decayed 23 January 2019	Decayed

Iridium 32	Decayed 10 March 2019	Decayed

Iridium 59	Decayed 11 March 2019	Decayed

Iridium 91	Decayed 13 March 2019	Decayed

Iridium 14	Decayed 15 March 2019	Decayed

Iridium 60	Decayed 17 March 2019	Decayed

Iridium 95	Decayed 25 March 2019	Decayed

Iridium 55	Decayed 31 March 2019	Decayed

Iridium 64	Decayed 1 April 2019	Decayed

Iridium 58	Decayed 7 April 2019	Decayed

Sentence(s)

In February 2009, Iridium 33 collided with the defunct satellite Kosmos 2251.

final_sentence: In February 2009, Iridium 33 collided with the defunct satellite Kosmos 2251.