145 Adeona

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145 Adeona
Discovery[1] and designation
Discovered by Christian Heinrich Friedrich Peters
Discovery date June 3, 1875
Named after
Minor planet category Main belt, adeona family
Orbital characteristics[2]
Epoch December 31, 2006 (JD 2454100.5)
Aphelion 457.677 Gm (3.059 AU)
Perihelion 341.958 Gm (2.286 AU)
399.817 Gm (2.673 AU)
Eccentricity 0.145
1595.888 d (4.37 a)
18.12 km/s
Inclination 12.637°
Physical characteristics
Dimensions 149.50 ± 5.45[1] km
Mass (2.08 ± 0.57) × 1018[1] kg
Mean density
1.18 ± 0.34[1] g/cm3
Equatorial surface gravity
0.0422 m/s²
Equatorial escape velocity
0.0799 km/s
0.0467 ± 0.0116[2]
Temperature ~170 K
C (Tholen)[2]

145 Adeona is a rather large main-belt asteroid. Its surface is very dark,[2] and, based upon its classification as a C-type asteroid, is probably composed of primitive carbonaceous material. The Adeona family of asteroids is named after it.

It was discovered by C. H. F. Peters on June 3, 1875, from the observatory at Hamilton College, Clinton, New York. Peters named it after Adeona, the Roman goddess of homecoming, because he had recently returned from a journey across the world to observe the transit of Venus. Peters also discovered 144 Vibilia on the same night.[3]

During 2001, 145 Adeona was observed by radar from the Arecibo Observatory. The return signal matched an effective diameter of 151 ± 18 km. This is consistent with the asteroid dimensions computed through other means.[4]

Adeona has been observed to occult a star once, on July 9, 2002.[citation needed]


  1. ^ a b c Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73: 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009.  See Table 1.
  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.  See Table 4.
  3. ^ Lutz D. Schmadel, Dictionary of Minor Planet Names, p.28.
  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