405 Thia

Thia (minor planet designation: 405 Thia) is a very large main-belt asteroid. It is classified as a C-type asteroid and is probably composed of carbonaceous material. This object was discovered by Auguste Charlois on July 23, 1895, in Nice, and was named after Theia (sometimes written Thea or Thia), a Titaness in Greek mythology.[4]

405 Thia
Discovery
Discovered byAuguste Charlois
Discovery date23 July 1895
Designations
(405) Thia
Pronunciation/ˈθə/[1]
Named after
Theia
1895 BZ
Main belt
Orbital characteristics[2]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc116.83 yr (42671 d)
Aphelion3.2130 AU (480.66 Gm)
Perihelion1.9592 AU (293.09 Gm)
2.5861 AU (386.88 Gm)
Eccentricity0.24241
4.16 yr (1519.0 d)
127.540°
 14m 13.164s / day
Inclination11.938°
255.245°
308.83°
Physical characteristics
Dimensions124.90±2.3 km[2]
122.14 ± 7.69 km[3]
Mass(1.38 ± 0.14) × 1018 kg[3]
Mean density
1.44 ± 0.30 g/cm3[3]
10.08 h (0.420 d)
0.0468±0.002
C
8.46

    In 2002, the asteroid was detected by radar from the Arecibo Observatory at a distance of 1.31 AU. The resulting data yielded an effective diameter of 125 ± 16 km.[5]

    References

    1. Noah Webster (1884) A Practical Dictionary of the English Language
    2. "405 Thia (1895 BZ)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 10 May 2016.
    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.
    4. Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names. Berlin, Heidelberg, New York: Springer. p. 48. ISBN 3-540-00238-3. Archived from the original on 14 March 2014.
    5. Magri, Christopher; et al. (January 2007), "A radar survey of main-belt asteroids: Arecibo observations of 55 objects during 1999 2003" (PDF), Icarus, 186 (1): 126–151, Bibcode:2007Icar..186..126M, doi:10.1016/j.icarus.2006.08.018, retrieved 14 April 2015.


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