ATLAS AGENA B R/B
| Launched | 26 August 1962 |
| Flight ended | – |
| Status | Unknown |
| Launch site | Air Force Eastern Test Range, Florida, USA |
| Owner | United States |
| NORAD ID | 375 |
| COSPAR ID | 1962-041B |
| Observing |
Timeline
| 1962 Aug 27 | – | Launch from Cape Canaveral LC-12 |
| 1962 Aug 29 | – | Cruise period science experiments turned on |
| 1962 Sep 4 | – | Course-correction maneuver |
| 1962 Sep 8 | – | Spacecraft developed attitude control fault |
| 1962 Oct 31 | – | Output from one solar panel deteriorated abruptly |
| 1962 Dec 14 | – | Flyby of Venus |
| 1962 Dec 27 | – | Spacecraft reached perihelion |
| 1963 Jan 3 | – | Last transmission from spacecraft |
Launched alongside
MARINER 2