Spacecraft information: ATLAS AGENA A R/B
| Launched | 30 January 1961 |
| Flight ended | 8 October 1970 |
| Status | Decayed |
| Launch site | Air Force Western Test Range, California, USA |
| Owner | United States |
| NORAD ID | 79 |
| COSPAR ID | 1961-001B |
| Observing |
Launched alongside
SAMOS 2