Planetary Data*
| Equatorial
Radius |
3,394 |
km |
|
0.53 |
Earth = 1 |
| Mass |
6.42x1023 |
kg |
|
0.11 |
Earth = 1 |
| Mean Density |
3930 |
kg/m3 |
| Surface Gravity |
0.38 |
Earth = 1 |
| Surface
Temperature |
180 - 270 |
K |
| Mean Orbital Speed |
24.13 |
km/s |
| Sidereal Period |
1.88 |
tropical
years |
| Synodic Period |
779.94 |
days |
Inclination
to the Ecliptic |
1.85 |
degrees |
| Greatest Angular Diameter As Seen
from Earth |
25 |
arc seconds |
| Number of Moons |
2 |
|
*Data taken from ASTRONOMY TODAY |
