Asteroid 128 Nemesis
Named after Nemesis, the goddess of retribution in Greek mythology.
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This file is not available for download, but provided by the Alcyone Ephemeris Small Body Data File DVD.
| Classification | Main-belt Asteroid |
Osculating Orbital Elements
| Epoch | 2444571,5 |
| Semi major axis | 2,7488 AU |
| Period [Julian yrs] | 4,558 Julian years |
| Inclination | 6,252 ° |
| Eccentricity | 0,1278 |
| Lon. of ascending node | 76,796 ° |
| Argument of perihelion | 302,517 ° |
| Passage of perihelion | 1981-Nov-26.389563 |
| Aphelion distance | 3,1001 AU |
| Mean anomaly | 281,413 ° |
Physical Data
| Radius | 94,08 km |
| Rotation period | 39 days |
| Absolute magnitude (H) | 7,49 |
| Magnitude Slope (G) | 0,15 |
| Color index (B-V) | 0,685 |
| Geometric albedo | 0,0504 |
| Spectral class | C |
Discovery Circumstances
| Discoverer | James Craig Watson |
| Discovered | 1872-11-25 |
Data File
| Data File Name | 128_Nemesis.aed |
| Data File Date | 2006-12-23 |
| Data File Size | 2714 kB |
| Covered Period | 1800,00 - 2100,00 |
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