Mars
 |
| A composite image of Mars. |
| Orbital characteristics (Epoch J2000) |
| Semi-major axis |
227,936,637 km (141,632,976 Miles)
1.523 662 31 AU |
| Orbital circumference |
1.429 Tm (888,005,041 Miles)
9.553 AU |
| Eccentricity |
0.093 412 33 |
| Perihelion |
206,644,545 km (128,402,710 Miles)
1.381 333 46 AU |
| Aphelion |
249,228,730 km (154.863,243 Miles)
1.665 991 16 AU |
| Orbital period |
686.9600 d
(1.8808 a) |
| Synodic period |
779.96 d
(2.135 a) |
| Avg. Orbital Speed |
24.077 km/s (53,820 Miles / Hour) |
| Max. Orbital Speed |
26.499 km/s (59,220 Miles / Hour) |
| Min. Orbital Speed |
21.972 km/s (49,140 Miles / Hour) |
| Inclination |
1.850 61°
(5.65° to Sun's equator) |
Longitude of the
ascending node |
49.578 54° |
Argument of the
perihelion |
286.462 30° |
| Number of satellites |
2 |
| |
| Physical characteristics |
| Equatorial diameter |
6,804.9 km (4228.4 Miles)
(0.533 Earths) |
| Polar diameter |
6,754.8 km (4197.2 Miles)
(0.531 Earths) |
| Oblateness |
0.007 36 |
| Surface area |
1.448×108 km2 (55.907 Million Square Miles)
(0.284 Earths) |
| Volume |
1.638×1011 km3
(0.151 Earths) |
| Mass |
6.4185×1023 kg
(0.107 Earths) |
| Mean density |
3.934 g/cm3 |
| Equatorial gravity |
3.69 m/s2
(0.376g) |
| Escape velocity |
5.027 km/s (11,232 Miles / Hour) |
| Rotation period |
1.025 957 d
(24.622 962 h) |
| Rotation velocity |
868.22 km/h (539.49 Miles / Hour)
(at the equator) |
| Axial tilt |
25.19° |
Right ascension
of North pole |
317.681 43°
(21 h 10 min 44 s) |
| Declination |
52.886 50° |
| Albedo |
0.15 |
Surface temp.
- min
- mean
- max |
133 K(-220 F)
210 K (-82 F)
293 K (68 F) |
| Adjective |
Martian |
| |
| Atmospheric characteristics |
| Atmospheric pressure |
0.7-0.9 kPa |
| Carbon dioxide |
95.32% |
| Nitrogen |
2.7% |
| Argon |
1.6% |
| Oxygen |
0.13% |
| Carbon monoxide |
0.07% |
| Water vapor |
0.03% |
| Nitric oxide |
0.01% |
| Neon |
2.5 ppm |
| Krypton |
300 ppb |
| Xenon |
80 ppb |
| Ozone |
30 ppb |
| Methane |
10.5 ppb |
|