128 Nemesis Guide, Meaning , Facts, Information and Description
| Orbital characteristics 1 | |
|---|---|
| Orbit type | Main belt (Nemesis) |
| Semimajor axis | 2.750 AU |
| Perihelion distance | 2.399 AU |
| Aphelion distance | 3.101 AU |
| Orbital period | 4.56 years |
| Inclination | 6.25° |
| Eccentricity | 0.128 |
| Physical characteristics 1 | |
| Diameter | 188.2 km |
| Rotation period | 39 hours |
| Spectral class | C |
| Abs. magnitude | 7.49 |
| Albedo 4 | 0.050 |
| History 2 | |
| Discoverer | J. C. Watson, 1872 |
128 Nemesis is a very large and very dark main belt asteroid and it has a carbonaceous composition. It rotates rather slowly, taking about one and half Earth days to complete one revolution.
Nemesis is the largest member of the Nemesis asteroid family.
It was discovered by J. C. Watson on November 25, 1872 and named after Nemesis, the goddess of retribution in Greek mythology.
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