Eris
To Be Entered Soon
|
| Perihelion (106 km) |
380.612 |
4436.82 |
5650 |
| Mean Orbital Distance (106 km) |
413.715 |
5906.38 |
10,120 |
| Aphelion (106 km) |
446.818 |
7375.93 |
14,600 |
| Average Orbital Velocity
(km/s) |
17.882 |
4.72 |
3.436 |
| Orbital Inclination (from
Earth's Orbit) |
10.587° |
17.16° |
44.187° |
| Orbital Eccentricity |
0.080 |
0.2488 |
0.44177 |
| Equatorial Radius (km) |
975 |
1195 |
2400 ± 100 |
| Polar Radius (km) |
909 |
1195 |
2400 ± 100 |
| Volume (1010 km3) |
0.20 |
0.715 |
~5.8 |
| Mass (1024 kg) |
0.00095 |
0.0125 |
? |
| Density (water=1) |
2.08 |
1.75 |
? |
| Escape Velocity (km/s) |
0.51 |
1.1 |
? |
| Gravity (m/s2) |
0.27 |
0.6 |
? |
| Surface Pressure (bars) |
0.27 |
0.6 |
? |
| Length of Day (hours) |
9.074 |
153.2820 |
> 8? |
| Tropical Orbital Period
(days) |
1679.819 |
90,588 |
203,500 |
| Albedo |
0.113 |
0.4-0.6 |
0.86±0.07 |
| Average
Surface Temperature (Celsius) |
-106° |
-225° |
~-240° |
| Number
of Moons |
|
|
|
| Rings? |
No |
No |
No |
| Absolute
Magnitude |
3.34 |
|
-1.12±0.01 |
| Discoverer |
Guiseppe Piazzi |
Clyde Tombaugh |
Mike E. Brown, C.A.
Trujillo, and D.L. Rabinowitz |
| Discovery
Date |
January
1, 1801 |
February
18, 1930 |
October
21, 2003 |
|
