Jump to content

117 Lomia

From Wikipedia, the free encyclopedia
(Redirected from Lomia)

117 Lomia
3D convex shape model of 117 Lomia
Discovery
Discovered byAlphonse Borrelly
Discovery date12 September 1871
Designations
(117) Lomia
Pronunciation/ˈlmiə/[1]
A871 RB;1900 DA;
1900 MC
Main belt
AdjectivesLomian
Orbital characteristics[2]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc123.03 yr (44938 d)
Aphelion3.0759 AU (460.15 Gm)
Perihelion2.90810 AU (435.046 Gm)
2.99201 AU (447.598 Gm)
Eccentricity0.028045
5.18 yr (1890.4 d)
17.22 km/s
317.47°
0° 11m 25.584s / day
Inclination14.902°
348.790°
52.461°
Earth MOID1.92459 AU (287.915 Gm)
Jupiter MOID2.0407 AU (305.28 Gm)
TJupiter3.204
Physical characteristics
Dimensions148.71±6.6 km[2]
146.78 ± 3.96 km[3]
Mass(6.08 ± 0.63) × 1018 kg[3]
Mean density
3.67 ± 0.48 g/cm3[3]
Equatorial surface gravity
0.0416 m/s²
Equatorial escape velocity
0.0786 km/s
9.127 h (0.3803 d)
0.0528±0.005[2]
0.053[4]
Temperature~161 K
XC[4]
7.95

117 Lomia is a large main-belt asteroid that has a nearly circular orbit; the orbital eccentricity is 0.029.[2] It was discovered by French astronomer Alphonse Borrelly on September 12, 1871, from the Marseilles Observatory.[5] The preliminary orbital elements were published in the following year by German astronomer Friedrich Tietjen.[6] 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).[5]

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.[4] It has an estimated cross-section diameter of ~148 km.

Eight occultations of stars by Lomia have so far been observed, between 2000 and 2018. Four of these events provided two or more chords across the asteroid, including a four-chord event in 2003.

References

[edit]
  1. ^ Per 'Lamia', which this is a misspelling of.
  2. ^ a b c d Yeomans, Donald K., "117 Lomia", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 12 May 2016.
  3. ^ a b c Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73 (1): 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
  4. ^ a b c di Martino, M.; et al. (July 1995), "Intermediate size asteroids: Photoelectric photometry of 8 objects.", Astronomy and Astrophysics Supplement, vol. 112, pp. 1–7, Bibcode:1995A&AS..112....1D.
  5. ^ a b Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names. Springer Science & Business Media. p. 25. ISBN 978-3-540-00238-3.
  6. ^ Tietjen, F. (1872), "Elemente und Ephemeride des Planeten (117) Lomia", Astronomische Nachrichten, 78 (21): 329–330, doi:10.1002/asna.18710782106. See Table 1.
[edit]