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PIONEER VENUS PROBE 4
Launch Details
| Launched | 7 August 1978 |
| Flight ended | 8 December 1978 |
| Status | Decayed |
| Launch site | Air Force Eastern Test Range, Florida, USA |
| Owner | United States |
| NORAD ID | 12106 |
| COSPAR ID | 1978-078G |
| Observing |
Timeline
| 1978 May 20 | – | Launch from Cape Canaveral SLC-36A |
| 1978 Dec 4 | – | Pioneer Venus Orbiter entered orbit around Venus |
| 1978 Dec 9 | – | Four small probes launched into Venus's atmosphere |
| 1992 Oct 8 | – | Last contact with Pioneer Venus Orbiter |
| 1992 Oct 22 | – | Pioneer Venus Orbiter descended into Venus's atmosphere (estimated) |