ATHENA 2 R/B
| Launched | 23 September 1999 | 
| Flight ended | 27 September 1999 | 
| Status | Decayed | 
| Launch site | Air Force Western Test Range, California, USA | 
| Owner | United States | 
| NORAD ID | 25920 | 
| COSPAR ID | 1999-051B | 
| Alternative names | OAM | 
| Observing |