109 Felicitas

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109 Felicitas
Discovery
Discovered by Christian Heinrich Friedrich Peters
Discovery date 9 October 1869
Designations
Named after
Felicitas
Main belt
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 146.39 yr (53470 d)
Aphelion 3.4971 AU (523.16 Gm)
Perihelion 1.89658 AU (283.724 Gm)
2.6968 AU (403.44 Gm)
Eccentricity 0.29674
4.43 yr (1617.6 d)
17.73 km/s
30.6904°
0° 13m 21.18s / day
Inclination 7.8813°
3.1617°
56.392°
Earth MOID 0.920053 AU (137.6380 Gm)
Jupiter MOID 1.95452 AU (292.392 Gm)
Jupiter Tisserand parameter 3.291
Physical characteristics
Dimensions 89.44±2.5 km[1]
88.971 km[2]
Mass 7.5×1017 kg
Equatorial surface gravity
0.0250 m/s²
Equatorial escape velocity
0.0473 km/s
13.191 h (0.5496 d)[1][3]
0.0699±0.004[1]
0.07 ± 0.02[2]
Temperature ~170 K
GC (Tholen)[2]
8.75,[1] 8.759[2]

109 Felicitas is a dark and fairly large main-belt asteroid. It was discovered by German-American astronomer C. H. F. Peters on October 9, 1869, and named after Felicitas, the Roman goddess of success.[4] The only observed stellar occultation by Felicitas is one from Japan (March 29, 2003).[5]

During 2002, 109 Felicitas was observed by radar from the Arecibo Observatory. The return signal matched an effective diameter of 89 ± 9 km. This is consistent with the asteroid dimensions computed through other means.[3]

References[edit]

  1. ^ a b c d e Yeomans, Donald K., "109 Felicitas", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 12 May 2016. 
  2. ^ a b c d Pravec, P.; et al. (May 2012), "Absolute Magnitudes of Asteroids and a Revision of Asteroid Albedo Estimates from WISE Thermal Observations", Asteroids, Comets, Meteors 2012, Proceedings of the conference held May 16–20, 2012 in Niigata, Japan (1667), Bibcode:2012LPICo1667.6089P. 
  3. ^ a b Magri, Christopher; et al. (January 2007), "A radar survey of main-belt asteroids: Arecibo observations of 55 objects during 1999–2003", Icarus, 186 (1): 126–151, Bibcode:2007Icar..186..126M, doi:10.1016/j.icarus.2006.08.018 
  4. ^ Schmadel, Lutz D. (2012), Dictionary of Minor Planet Names (6th ed.), Springer, p. 23, ISBN 3642297188. 
  5. ^ Observed minor planet occultation events, version of 2005 July 26

External links[edit]