DELTA 2 R/B(2)
| Launched | 2 January 1999 |
| Flight ended | – |
| Status | Unknown |
| Launch site | Air Force Eastern Test Range, Florida, USA |
| Owner | United States |
| NORAD ID | 25606 |
| COSPAR ID | 1999-001B |
| Observing |
Timeline
| 1999 Jan 3 | – | Launch from Cape Canaveral SLC-17A |
| 1999 Dec 3 | – | Last contact with spacecraft |
| 1999 Dec 3 | – | Crash landing on Mars |