Mars in true color,
[a] as captured by the
Hope orbiter. The
Tharsis Montes can be seen at the center, with
Olympus Mons just to the left and
Valles Marineris at the right.
|
|||||||||
| Designations | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Adjectives |
|
||||||||
| Symbol | .svg){kind=small} |
||||||||
| Orbital characteristics[1] | |||||||||
| Epoch J2000 | |||||||||
| Aphelion | 249261000 km (1.66621 AU)[2] |
||||||||
| Perihelion | 206650000 km (1.3814 AU)[2] |
||||||||
| 227939366 km (1.52368055 AU)[3] |
|||||||||
| Eccentricity | 0.0934[2] | ||||||||
| 686.980 d (1.88085 yr; 668.5991 sols)[2] |
|||||||||
| 779.94 d (2.1354 yr)[3] |
|||||||||
|
Average
orbital speed
|
24.07 km/s[2] | ||||||||
| 19.412°[2] | |||||||||
| Inclination |
|
||||||||
| 49.57854°[2] | |||||||||
| 2022-Jun-21[5] | |||||||||
| 286.5°[3] | |||||||||
| Satellites | 2 (Phobos and Deimos) | ||||||||
| Physical characteristics | |||||||||
| 3389.5±0.2 km[b][6] | |||||||||
|
Equatorial radius
|
3396.2±0.1 km[b][6] (0.533 Earths) |
||||||||
|
Polar radius
|
3376.2±0.1 km[b][6] (0.531 Earths) |
||||||||
| Flattening | 0.00589±0.00015[5][6] | ||||||||
| 1.4437×108 km2[7] (0.284 Earths) |
|||||||||
| Volume | 1.63118×1011 km3[8] (0.151 Earths) |
||||||||
| Mass | 6.4171×1023 kg[9] (0.107 Earths) |
||||||||
|
Mean
density
|
3.9335 g/cm3[8] | ||||||||
| 3.72076 m/s2 (0.3794 g0)[10] | |||||||||
| 0.3644±0.0005[9] | |||||||||
| 5.027 km/s (18100 km/h)[11] |
|||||||||
| 1.02749125 d[12] 24h 39m 36s |
|||||||||
| 1.025957 d 24h 37m 22.7s[8] |
|||||||||
|
Equatorial rotation velocity
|
241 m/s (870 km/h)[2] |
||||||||
| 25.19° to its orbital plane[2] | |||||||||
|
North pole
right ascension
|
317.269°[13] | ||||||||
|
North pole
declination
|
54.432°[13] | ||||||||
| Albedo | |||||||||
| Temperature | 209 K (−64 °C) (blackbody temperature)[15] | ||||||||
|
|||||||||
| Surface absorbed dose rate | 8.8 μGy/h[18] | ||||||||
| Surface equivalent dose rate | 27 μSv/h[18] | ||||||||
| −2.94 to +1.86[19] | |||||||||
| −1.5[20] | |||||||||
| 3.5–25.1″[2] | |||||||||
| Atmosphere[2][21] | |||||||||
|
Surface
pressure
|
0.636 (0.4–0.87) kPa 0.00628 atm |
||||||||
| Composition by volume |
|
||||||||
|
|
|||||||||
|
Mars in true color,
[a] as captured by the
Hope orbiter. The
Tharsis Montes can be seen at the center, with
Olympus Mons just to the left and
Valles Marineris at the right.
|
|||||||||
| Designations | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Adjectives |
|
||||||||
| Symbol | |
||||||||
| Orbital characteristics[1] | |||||||||
| Epoch J2000 | |||||||||
| Aphelion | 249261000 km (1.66621 AU)[2] |
||||||||
| Perihelion | 206650000 km (1.3814 AU)[2] |
||||||||
| 227939366 km (1.52368055 AU)[3] |
|||||||||
| Eccentricity | 0.0934[2] | ||||||||
| 686.980 d (1.88085 yr; 668.5991 sols)[2] |
|||||||||
| 779.94 d (2.1354 yr)[3] |
|||||||||
|
Average
orbital speed
|
24.07 km/s[2] | ||||||||
| 19.412°[2] | |||||||||
| Inclination |
|
||||||||
| 49.57854°[2] | |||||||||
| 2022-Jun-21[5] | |||||||||
| 286.5°[3] | |||||||||
| Satellites | 2 (Phobos and Deimos) | ||||||||
| Physical characteristics | |||||||||
| 3389.5±0.2 km[b][6] | |||||||||
|
Equatorial radius
|
3396.2±0.1 km[b][6] (0.533 Earths) |
||||||||
|
Polar radius
|
3376.2±0.1 km[b][6] (0.531 Earths) |
||||||||
| Flattening | 0.00589±0.00015[5][6] | ||||||||
| 1.4437×108 km2[7] (0.284 Earths) |
|||||||||
| Volume | 1.63118×1011 km3[8] (0.151 Earths) |
||||||||
| Mass | 6.4171×1023 kg[9] (0.107 Earths) |
||||||||
|
Mean
density
|
3.9335 g/cm3[8] | ||||||||
| 3.72076 m/s2 (0.3794 g0)[10] | |||||||||
| 0.3644±0.0005[9] | |||||||||
| 5.027 km/s (18100 km/h)[11] |
|||||||||
| 1.02749125 d[12] 24h 39m 36s |
|||||||||
| 1.025957 d 24h 37m 22.7s[8] |
|||||||||
|
Equatorial rotation velocity
|
241 m/s (870 km/h)[2] |
||||||||
| 25.19° to its orbital plane[2] | |||||||||
|
North pole
right ascension
|
317.269°[13] | ||||||||
|
North pole
declination
|
54.432°[13] | ||||||||
| Albedo | |||||||||
| Temperature | 209 K (−64 °C) (blackbody temperature)[15] | ||||||||
|
|||||||||
| Surface absorbed dose rate | 8.8 μGy/h[18] | ||||||||
| Surface equivalent dose rate | 27 μSv/h[18] | ||||||||
| −2.94 to +1.86[19] | |||||||||
| −1.5[20] | |||||||||
| 3.5–25.1″[2] | |||||||||
| Atmosphere[2][21] | |||||||||
|
Surface
pressure
|
0.636 (0.4–0.87) kPa 0.00628 atm |
||||||||
| Composition by volume |
|
||||||||
|
|
|||||||||
