117 Lomia
Discovery | |
---|---|
Discovered by | Alphonse Borrelly |
Discovery date | 12 September 1871 |
Designations | |
Main belt | |
Orbital characteristics[1] | |
Epoch 31 July 2016 (JD 2457600.5) | |
Uncertainty parameter 0 | |
Observation arc | 123.03 yr (44938 d) |
Aphelion | 3.0759 AU (460.15 Gm) |
Perihelion | 2.90810 AU (435.046 Gm) |
2.99201 AU (447.598 Gm) | |
Eccentricity | 0.028045 |
5.18 yr (1890.4 d) | |
Average orbital speed | 17.22 km/s |
317.47° | |
0° 11m 25.584s / day | |
Inclination | 14.902° |
348.790° | |
52.461° | |
Earth MOID | 1.92459 AU (287.915 Gm) |
Jupiter MOID | 2.0407 AU (305.28 Gm) |
Jupiter Tisserand parameter | 3.204 |
Physical characteristics | |
Dimensions |
±6.6 km 148.71[1] 146.78 ± 3.96 km[2] |
Mass | (6.08 ± 0.63) × 1018 kg[2] |
Mean density | 3.67 ± 0.48 g/cm3[2] |
Equatorial surface gravity | 0.0416 m/s² |
Equatorial escape velocity | 0.0786 km/s |
9.127 h (0.3803 d) | |
±0.005 0.0528[1] 0.053[3] | |
Temperature | ~161 K |
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 3 4 Yeomans, Donald K., "117 Lomia", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 12 May 2016.
- 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