104 Klymene

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104 Klymene
Discovered by James Craig Watson
Discovery date September 13, 1868
Main belt
Orbital characteristics[1]
Epoch December 31, 2006 (JD 2454100.5)
Aphelion 544.012 Gm (3.636 AU)
Perihelion 399.428 Gm (2.670 AU)
471.720 Gm (3.153 AU)
Eccentricity 0.153
2045.203 d
(5.60 a)
16.67 km/s
Inclination 2.791°
Physical characteristics
Dimensions 123.7 km
Mass 2.0×1018 kg
0.0346 m/s²
0.0654 km/s
Temperature ~157 K
Spectral type

104 Klymene is a large, dark Themistian asteroid that was discovered by J. C. Watson on September 13, 1868, and named after one of the many Clymenes in Greek mythology.[2] It is classified as a C-type asteroid, indicating it probably has a carbonaceous composition. The spectra indicates the presence of aqueous-altered minerals on the surface.[3]

Based upon measurements made using adaptive optics at the W. M. Keck Observatory, this object may have a bi-lobed shape with a length of 163 ± 3 km and width of 103 ± 5 km, for an average dimension of 133 km.[4] This asteroid is a member of the Themis family of asteroids that share similar orbital elements.[5] It is listed as a member of the Hecuba group of asteroids that orbit near the 2:1 mean-motion resonance with Jupiter.[6]


  1. ^ Yeomans, Donald K., "104 Klymene", JPL Small-Body Database Browser (NASA Jet Propulsion Laboratory), retrieved 2013-03-25. 
  2. ^ Dictionary of minor planet names. p. 25. International Astronomical Union. 2003. Springer
  3. ^ Fornasier, S. et al. (February 1999), "Spectroscopic comparison of aqueous altered asteroids with CM2 carbonaceous chondrite meteorites", Astronomy and Astrophysics Supplement Series 135 (1): 65–73, Bibcode:1999A&AS..135...65F, doi:10.1051/aas:1999161. 
  4. ^ Marchis, F. et al. (November 2006), "Shape, size and multiplicity of main-belt asteroids. I. Keck Adaptive Optics survey", Icarus 185 (1): 39–63, Bibcode:2006Icar..185...39M, doi:10.1016/j.icarus.2006.06.001, PMC 2600456, PMID 19081813. 
  5. ^ Moore, Patrick; Rees, Robin, eds. (2011), "Patrick Moore's Data Book of Astronomy", Patrick Moore's Data Book of Astronomy by Patrick Moore and Robin Rees. Cambridge University Press (2nd ed.) (Cambridge University Press): 165, Bibcode:2011pmdb.book.....M, ISBN 9781139495226. 
  6. ^ McDonald, Sophia Levy (June 1948), "General perturbations and mean elements, with representations of 35 minor planets of the Hecuba group", Astronomical Journal 53: 199, Bibcode:1948AJ.....53..199M, doi:10.1086/106097.