212 Medea

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212 Medea
Discovery
Discovered by Johann Palisa
Discovery date February 6, 1880
Designations
Named after
Medea
1930 FW
Minor planet category Main belt
Orbital characteristics[1]
Epoch 30 January 2005 (JD 2453400.5)
Aphelion 518.201 Gm (3.464 AU)
Perihelion 413.154 Gm (2.762 AU)
465.677 Gm (3.113 AU)
Eccentricity 0.113
2005.994 d (5.49 a)
16.88 km/s
356.798°
Inclination 4.265°
313.697°
99.624°
Physical characteristics
Dimensions 144.13 ± 7.23[2] km
Mass (1.32 ± 0.10) × 1019[2] kg
Mean density
8.41 ± 1.43[2] g/cm3
10.12[3] h
Albedo 0.047
Spectral type
DCX:[3]
8.28

212 Medea is a very large main-belt asteroid that was discovered by Johann Palisa on February 6, 1880, in Pola, and was named after Medea, a figure in Greek mythology.[4]

Photometric observations of this asteroid in 1987 gave an incomplete light curve with a period of 10.12 ± 0.06 hours and a brightness variation of 0.13 in magnitude. This object has a spectrum that matches a DCX: classification.[3] Lightcurve data has also been recorded by observers at the Antelope Hill Observatory, which has been designated as an official observatory by the Minor Planet Center. They found a period of 10.283 hours with a brightness variation of 0.08 magnitude.[5]

References[edit]

  1. ^ Yeomans, Donald K., "212 Medea", JPL Small-Body Database Browser (NASA Jet Propulsion Laboratory), retrieved 2013-03-25. 
  2. ^ 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.
  3. ^ a b c di Martino, M. et al. (July 1995), "Intermediate size asteroids: Photoelectric photometry of 8 objects.", Astronomy and Astrophysics Supplement 112: 1–7, Bibcode:1995A&AS..112....1D. 
  4. ^ Schmadel Lutz D. Dictionary of Minor Planet Names (fifth edition), Springer, 2003. ISBN 3-540-00238-3.
  5. ^ Lightcurve Results

External links[edit]