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Mars 4 (Russian: Марс-4), also known as 3MS No.52S was a Soviet spacecraft intended to explore Mars. A 3MS spacecraft launched as part of the Mars programme, it was intended to enter orbit around Mars in 1974. However, computer problems prevented orbital insertion from occurring.
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mars spacecraft 3ms launch launched orbit also two 1973 intended soviet instruments 52s enter around 1974 however orbital mission program
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Mars 4 | Aphelion altitude | 1.63 AU | 1.00 | infobox |
| Mars 4 | Closest approach | 10 February 1974, 15:34 UTC | 1.00 | infobox |
| Mars 4 | Contractor | Khrunichev | 1.00 | infobox |
| Mars 4 | COSPAR ID | 1973-047A | 1.00 | infobox |
| Mars 4 | Distance | 1,844 km (1,146 mi) | 1.00 | infobox |
| Mars 4 | Inclination | 2.2° | 1.00 | infobox |
| Mars 4 | Last contact | 10 February 1974, 15:38 UTC | 1.00 | infobox |
| Mars 4 | Launch date | 21 July 1973, 19:30:59 (1973-07-21UTC19:30:59Z) UTC | 1.00 | infobox |
| Mars 4 | Launch mass | 3,440 kg (7,580 lb) | 1.00 | infobox |
| Mars 4 | Launch site | Baikonur 81/23 | 1.00 | infobox |
| Mars 4 | Manufacturer | NPO Lavochkin | 1.00 | infobox |
| Mars 4 | Mission duration | 203 days, 20 hours and 7 minutes | 1.00 | infobox |
| Mars 4 | Mission type | Mars orbiter | 1.00 | infobox |
| Mars 4 | Operator | Soviet space program | 1.00 | infobox |
| Mars 4 | Perihelion altitude | 1.02 AU | 1.00 | infobox |
| Mars 4 | Period | 556 days | 1.00 | infobox |
| Mars 4 | Reference system | Heliocentric | 1.00 | infobox |
| Mars 4 | Rocket | Proton-K/D | 1.00 | infobox |
| Mars 4 | SATCAT no. | 6742 | 1.00 | infobox |
| Mars 4 | Spacecraft | 3MS No.52S | 1.00 | infobox |
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