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Mars
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For other uses, including the Roman god, see Mars (disambiguation).
Mars Astronomical symbol of Mars The planet Mars
Mars as seen by the Hubble Space Telescope
Orbital characteristics[1]
Epoch J2000
Aphelion 249,209,300 km
1.665861 AU
Perihelion 206,669,000 km
1.381497 AU
Semi-major axis 227,939,100 km
1.523679 AU
Eccentricity 0.093315
Orbital period 686.971 day

1.8808 Julian years
668.5991 sols
Synodic period 779.96 day
2.135 Julian years
Average orbital speed 24.077 km/s
Inclination 1.850°
5.65° to Sun's Equator
Longitude of ascending node 49.562°
Argument of perihelion 286.537°
Satellites 2
Physical characteristics
Equatorial radius 3,396.2 ± 0.1 km[2][3]
0.533 Earths
Polar radius 3,376.2 ± 0.1 km[2][3]
0.531 Earths
Flattening 0.00589 ± 0.00015
Surface area 144,798,500 km²
0.284 Earths
Volume 1.6318×1011 km³
0.151 Earths
Mass 6.4185×1023 kg
0.107 Earths......

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Approximate Pages: 41 (250 words per double-spaced page)

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