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Mars has an orbit with a semimajor axis of 1.524 astronomical units (228 million km) (12.673 light minutes), and an eccentricity of 0.0934. [1] [2] The planet orbits the Sun in 687 days [3] and travels 9.55 AU in doing so, [4] making the average orbital speed 24 km/s.
The length of time for Mars to complete one orbit around the Sun in respect to the stars, its sidereal year, is about 686.98 Earth solar days (≈ 1.88 Earth years), or 668.5991 sols. Because of the eccentricity of Mars' orbit, the seasons are not of equal length.
Orbit of Mars and other Inner Solar System planets. Mars's average distance from the Sun is roughly 230 million km (143 million mi), and its orbital period is 687 (Earth) days. The solar day (or sol) on Mars is only slightly longer than an Earth day: 24 hours, 39 minutes, and 35.244 seconds. [185]
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Deactivated 516 days after entering orbit. Atlas SLV-3C Centaur-D: 18 Mars 4: Mars 4 (3MS No.52S) 21 July 1973 Soviet Union: Orbiter Partial success [15] Failed to perform orbital insertion burn. Returned photographs of Mars during flyby. Proton-K/D: 19 Mars 5: Mars 5 (3MS No.53S) 25 July 1973 Soviet Union: Orbiter Successful Contact lost after ...
entered orbit: 203 days (6 mo, 19 d) Mars 5 collected images and other data from Mars for 22 days. [12] Mars 6 Lander: Mars 5 August 1973 12 March 1974 impact: 220 days (7 mo, 8 d) Mars 6 crash-landed on Mars and contact with the craft was lost. [13] Venera 9 orbiter and lander Venus 8 June 1975 20 October 1975 entered orbit 22 October 1975 ...
The company is one of NASA's largest contractors and is one of several currently working on projects related to Mars. So far, only unmanned rovers and orbiters have made it to the Red Planet. When ...
The average duration of the day-night cycle on Mars — i.e., a Martian day — is 24 hours, 39 minutes and 35.244 seconds, [3] equivalent to 1.02749125 Earth days. [4] The sidereal rotational period of Mars—its rotation compared to the fixed stars—is 24 hours, 37 minutes and 22.66 seconds. [4]