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Discovery
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|---|---|
| Discovered by | Alphonse Borrelly |
| Discovery date | September 12, 1871 |
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Designations
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| Alternate name(s) | |
| Minor planet category |
Main belt |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 460.170 Gm (3.076 AU) |
| Perihelion | 434.790 Gm (2.906 AU) |
| Semi-major axis | 447.480 Gm (2.991 AU) |
| Eccentricity | 0.028 |
| Orbital period | 1889.604 d (5.17 a) |
| Average orbital speed | 17.22 km/s |
| Mean anomaly | 0.674° |
| Inclination | 14.928° |
| Longitude of ascending node | 348.991° |
| Argument of perihelion | 62.315° |
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Physical characteristics
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| Dimensions | 148.7 km |
| Mass | 3.4×1018 kg |
| Mean density | ? g/cm³ |
| Equatorial surface gravity | 0.0416 m/s² |
| Escape velocity | 0.0786 km/s |
| Rotation period | ? d |
| Albedo | ? |
| Temperature | ~161 K |
| Spectral type | C |
| Absolute magnitude (H) | 7.95 |
117 Lomia is a rather large main-belt asteroid that has a nearly circular orbit. It has a very dark surface and primitive carbonaceous composition. It was discovered by Alphonse Borrelly on September 12, 1871 from the Marseilles Observatory. The reason for the name is uncertain, but Lutz D. Schmadel believes it is most likely a misspelling of Lamia, the female demon of Greek mythology (the asteroid 248 Lameia is also named after this figure).[1]
Two occultations of stars by Lomia have so far been observed, in 2000 and 2003.
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