109 Felicitas

Felicitas (minor planet designation: 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.[5] The only observed stellar occultation by Felicitas is one from Japan (March 29, 2003).[6]

109 Felicitas
Discovery
Discovered byChristian Heinrich Friedrich Peters
Discovery date9 October 1869
Designations
(109) Felicitas
Pronunciation/fɪˈlɪsɪtæs/[1]
Named after
Felicitas
Main belt
Orbital characteristics[2]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc146.39 yr (53470 d)
Aphelion3.4971 AU (523.16 Gm)
Perihelion1.89658 AU (283.724 Gm)
2.6968 AU (403.44 Gm)
Eccentricity0.29674
4.43 yr (1617.6 d)
17.73 km/s
30.6904°
0° 13m 21.18s / day
Inclination7.8813°
3.1617°
56.392°
Earth MOID0.920053 AU (137.6380 Gm)
Jupiter MOID1.95452 AU (292.392 Gm)
TJupiter3.291
Physical characteristics
Dimensions89.44±2.5 km[2]
88.971 km[3]
Mass7.5×1017 kg
Equatorial surface gravity
0.0250 m/s²
Equatorial escape velocity
0.0473 km/s
13.191 h (0.5496 d)[2][4]
0.0699±0.004[2]
0.07 ± 0.02[3]
Temperature~170 K
GC (Tholen)[3]
8.75,[2] 8.759[3]

    This body is orbiting the Sun with a period of 4.43 years and an eccentricity (ovalness) of 0.3. Its orbital plane is inclined by 7.9° from the plane of the ecliptic. 109 Felicitas is classified as a carbonaceous GC-type asteroid. It is spinning with a rotation period of 13.2 hours. 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.[4]

    References
    1. Noah Webster (1884) A Practical Dictionary of the English Language
    2. Yeomans, Donald K., "109 Felicitas", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 12 May 2016.
    3. 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 (1667), p. 6089, Bibcode:2012LPICo1667.6089P.
    4. 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
    5. Schmadel, Lutz D. (2012), Dictionary of Minor Planet Names (6th ed.), Springer, p. 23, ISBN 978-3642297182.
    6. Observed minor planet occultation events, version of 2005 July 26


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