Mariner 9
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Mariner 9 was a NASA spacecraft that became the first artificial object to orbit another planet when it arrived on Mars on 1971-Nov-14, narrowly beating the two Soviet probes (Mars 2 and Mars 3) by two weeks. It remained active until 1972-Oct-27, and is predicted to have deorbited by 2022 at the earliest
| Mariner Program (1962-1975) |
||
|---|---|---|
| Mission | Start | End |
| Mariner 8 | 1971-May-9 | |
| Spacecraft lost after stage separation failure of its Centaur-D upper stage | ||
| Mariner 9 | 1971-May-30 | 1972-Oct-27 |
| First spacecraft to orbit another planet (1,394 x 17,144 km) | ||
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