Asteroid 18 Melpomene
Named after Melpomene, the Muse of tragedy in Greek mythology.
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| Classification | Main-belt Asteroid |
| Notes | A possible Melpomenean satellite (S/1978 (18) 1) with a diameter at least 37
km was detected. |
Osculating Orbital Elements
| Epoch | 2442066,5 |
| Semi major axis | 2,2950 AU |
| Period [Julian yrs] | 3,477 Julian years |
| Inclination | 10,128 ° |
| Eccentricity | 0,2183 |
| Lon. of ascending node | 150,844 ° |
| Argument of perihelion | 227,374 ° |
| Passage of perihelion | 1974-Dec-28.377039 |
| Aphelion distance | 2,7959 AU |
| Mean anomaly | 262,659 ° |
Physical Data
| Radius | 70,29 km |
| Rotation period | 11,5714 days |
| Absolute magnitude (H) | 6,3841 |
| Magnitude Slope (G) | 0,25 |
| Color index (B-V) | 0,854 |
| Geometric albedo | 0,2225 |
| Spectral class | S |
Discovery Circumstances
| Discoverer | John Russell Hind |
| Discovered | 1852-06-24 |
Data File
| Data File Name | 18_Melpomene.aed |
| Data File Date | 2006-07-19 |
| Data File Size | 2714 kB |
| Covered Period | 1800,00 - 2100,00 |
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