TRANSIT 3B & LOFTI 1
| Launched | 21 February 1961 |
| Flight ended | 29 March 1961 |
| Status | Decayed |
| Launch site | Air Force Eastern Test Range, Florida, USA |
| Owner | United States |
| NORAD ID | 87 |
| COSPAR ID | 1961-007A |
| Observing |
TRANSIT 3B & LOFTI 1
| Launched | 21 February 1961 |
| Flight ended | 29 March 1961 |
| Status | Decayed |
| Launch site | Air Force Eastern Test Range, Florida, USA |
| Owner | United States |
| NORAD ID | 87 |
| COSPAR ID | 1961-007A |
| Observing |