STEREO A
| Launched | 25 October 2006 |
| Flight ended | – |
| Status | Operational |
| Launch site | Air Force Eastern Test Range, Florida, USA |
| Owner | United States |
| NORAD ID | 29510 |
| COSPAR ID | 2006-047A |
| Alternative names |
STEREO EAST STEREO LAG SOLAR TERRESTRIAL RELATIONS OBSERVATORY A |
| Observing |