Image from MESSENGER's second Mercury flyby. Kuiper crater is just below center. An extensive ray system emanates from the crater near the top.physical characteristics:
| Mean radius | 2439.7 ± 1.0 km |
Flattening
| <6000 |
surface area
| 7.48×107 km2 |
volume
| 6.083×1010 km3 |
Mass
| 3.3022×1023 kg |
mean density
| 5.427 g/cm³ |
Equatorial surface gravity
| 3.7 m/s² |
Escape velocity
| 4.25 km/s |
sidereal rotation period
| 58.646 day |
| Equatorial rotation velocity | 10.892 km/h |
Axial tilt
| 2.11′ ± 0.1′ |
North pole right ascension
| 281.01° |
North pole declination
| 61.45° |
Albedo
| 0.119 bond
|
Apparent magnitude
| up to −1.9 |
Angular diameter
| 4.5" – 13" |
| surface temperature (0°N, 0°W) | minimum 100k
|
| surface temperature (0°N, 0°W) | medium 340k
|
| surface temperature (0°N, 0°W) | maximum 700k
|
| surface temperature (85°N, 0°W) | minimum 80k
|
| surface temperature (85N, 0°W) | medium 200k
|
| surface temperature (85N, 0°W) | maximum 380k
|
No comments:
Post a Comment