117 Lomia
| Discovery | |
|---|---|
| Discovered by | Alphonse Borrelly |
| Discovery date | September 12, 1871 |
| Designations | |
| Main belt | |
| Orbital characteristics[1] | |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 460.170 Gm (3.076 AU) |
| Perihelion | 434.790 Gm (2.906 AU) |
| 447.480 Gm (2.991 AU) | |
| Eccentricity | 0.0287 |
| 1889.604 d (5.17 a) | |
Average orbital speed | 17.22 km/s |
| 0.674° | |
| Inclination | 14.928° |
| 348.991° | |
| 62.315° | |
| Physical characteristics | |
| Dimensions | 146.78 ± 3.96[2] km |
| Mass | (6.08 ± 0.63) × 1018 kg[2] |
Mean density | 3.67 ± 0.48[2] g/cm3 |
| 0.0416 m/s² | |
| 0.0786 km/s | |
| Albedo | 0.053[3] |
| Temperature | ~161 K |
Spectral type | XC[3] |
| 7.95 | |
|
| |
117 Lomia is a large main-belt asteroid that has a nearly circular orbit; the orbital eccentricity is 0.029.[1] It was discovered by French astronomer Alphonse Borrelly on September 12, 1871, from the Marseilles Observatory.[4] The preliminary orbital elements were published in the following year by German astronomer Friedrich Tietjen.[5] 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).[4]
Photometric observations of this asteroid in 1985 gave a light curve with a period of 9.127 ± 0.009 hours and a brightness variation of 0.29 ± 0.03 in magnitude. The curve is symmetrical with a single maxima and minima. This object has a spectrum that matches an XC classification; occupying the transition range between an X-type and a C-type asteroid.[3]
Two occultations of stars by Lomia have so far been observed, in 2000 and 2003.
References
- 1 2 Yeomans, Donald K., "117 Lomia", JPL Small-Body Database Browser (NASA Jet Propulsion Laboratory), retrieved 2013-03-25.
- 1 2 3 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73, pp. 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
- 1 2 3 di Martino, M.; et al. (July 1995), "Intermediate size asteroids: Photoelectric photometry of 8 objects.", Astronomy and Astrophysics Supplement 112, pp. 1–7, Bibcode:1995A&AS..112....1D.
- 1 2 Lutz D. Schmadel, Dictionary of Minor Planet Names, p. 25.
- ↑ Tietjen, F. (1872), "Elemente und Ephemeride des Planeten (117) Lomia", Astronomische Nachrichten 78 (21), pp. 329–330, doi:10.1002/asna.18710782106. See Table 1.
External links
- 117 Lomia at the JPL Small-Body Database
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