MARS EXPLORER ROVER A
| Launched | 9 June 2003 |
| Flight ended | 2 January 2004 |
| Status | Decayed |
| Launch site | Air Force Eastern Test Range, Florida, USA |
| Owner | United States |
| NORAD ID | 27827 |
| COSPAR ID | 2003-027A |
| Alternative names |
SPIRIT MER-A |
| Observing |
Timeline
| 2003 Jun 10 | – | Launch from Cape Canaveral SLC-17A |
| 2004 Jan 4 | – | Landing on Mars |
| 2004 Jan 21 | – | Contact with Spirit lost due to flash memory issue |
| 2004 Feb 6 | – | Spirit restored to full working condition |
| 2009 May 1 | – | Spirit rover becomes stuck in soft soil |
| 2010 Jan 26 | – | Attempts to free the rover abandoned |
| 2010 Mar 22 | – | Last contact with rover |
| 2011 May 24 | – | Attempts to contact rover ended |