DELTA 1 R/B
| Launched | 21 January 1969 |
| Flight ended | 7 December 1979 |
| Status | Decayed |
| Launch site | Air Force Eastern Test Range, Florida, USA |
| Owner | United States |
| NORAD ID | 3664 |
| COSPAR ID | 1969-006B |
| Observing |
Launched alongside
OSO 5DELTA 1 R/B
| Launched | 21 January 1969 |
| Flight ended | 7 December 1979 |
| Status | Decayed |
| Launch site | Air Force Eastern Test Range, Florida, USA |
| Owner | United States |
| NORAD ID | 3664 |
| COSPAR ID | 1969-006B |
| Observing |
Launched alongside
OSO 5