1973-053A
The Mars-7 (3MP No. 51P) spacecraft suffered a computer failure; the landing probe was deployed in the wrong direction, causing it to miss the planet.
Mars-7 carried an IKI/CNRS photometer which measured Lyman alpha emission from the local ISM, and particle detectors which measured solar proton flares including a big flare on 1973 Sep 7 when Mars-7 was 8.5Mkm outside the Earth's orbit, around 8.5Mkm west of the Sun-Earth line, and 4.5 Mkm above the ecliptic plane. Mars-7 was slightly closer to the plane than Mars-4 and Mars-5, which were 3 Mkm from Mars-7 and 1 Mkm from each other. According to a sketch in SR16,769, (Kontor et al), the radial order was Mars-7,5,4, i.e. 4 was the furthest out.
| Mars-7 | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1973 Aug 9 | 1700:17 | Launch by Proton-K | KB |
| 1702 | Stage 1 sep | ||
| 1705 | Stage 2 sep | ||
| 1709 | Stage 3 MECO | ||
| 1709 | Stage 3 sep | ||
| 1713? | Blok-D MES-1 | ||
| 1715? | Blok-D MECO-1 | ||
| 1815 | Blok-D burn 2, solar orbit | ||
| 1821? | Blok-D MECO-2 | ||
| 1821? | Blok-D sep | ||
| 1973 Aug 16 | TCM 5.7m/s | ||
| 1973 Sep 7 | 10Mkm from Earth, b(ec)=+8 deg, z=+4.5Mkm | ||
| 1974 Mar 1 | TCM 2.2m/s | ||
| 1974 Mar 9 | Mars flyby, 1300 km | ||
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