 |
| Discovered by William Lassell in 1846 |
| Mass (kg) 2.14e+22 |
| Mass (Earth = 1) 3.5810e-03 |
| Equatorial radius (km) 1,350 |
| Equatorial radius (Earth = 1) 2.1167e-01 |
| Mean density (gm/cm^3) 2.07 |
| Mean distance from Neptune (km) 354,800 |
| Rotational period (days) -5.87685 |
| Orbital period (days) -5.87685 |
| Mean orbital velocity (km/sec) -4.39 |
| Orbital eccentricity 0.0000 |
| Orbital inclination (degrees) 157.35 |
| Escape velocity (km/sec) 1.45 |
| Visual geometric albedo 0.7 |
| Magnitude (Vo) 13.47 |
| Mean surface temperature -235°C
|
Slide 5, .png format
Slide 6, .png format
Side note: I have re-arranged these slides for web-viewing.
|
The odd cantaloupe terrain below is thought to be caused by frost heaves.
Frost heaves are well known on Earth, especially to Minnesotans and Alaskans.
The white arrows indicate craters, which are rarely seen on Earth. Both planets are resurfaced relatively quickly.
 |
The black marks abive indicate what NASA scientists think could be geysers, which are also found on Earth’s surface |
|
