3D convex shape model of 212 Medea | |
Discovery | |
---|---|
Discovered by | Johann Palisa |
Discovery date | 6 February 1880 |
Designations | |
(212) Medea | |
Pronunciation | /mɪˈdiːə/[1] |
Named after | Medea |
A880 CA, 1930 FW | |
Minor planet category | Main belt |
Orbital characteristics[2] | |
Epoch 31 July 2016 (JD 2457600.5) | |
Uncertainty parameter 0 | |
Observation arc | 136.05 yr (49694 d) |
|{{{apsis}}}|helion}} | 3.4422 astronomical unit|AU (514.95 Gm) |
|{{{apsis}}}|helion}} | 2.78929 AU (417.272 Gm) |
3.11575 AU (466.110 Gm) | |
Eccentricity | 0.10478 |
Orbital period | 5.50 yr (2008.8 d) |
Mean anomaly | 28.1280° |
Mean motion | 0° 10m 45.156s / day |
Inclination | 4.2636° |
Longitude of ascending node | 313.478° |
100.91° | |
Physical characteristics | |
Mean diameter | 136.12±2.5 km[2] 144.13 ± 7.23 km[3] |
Mass | (1.32 ± 0.10) × 1019 kg[3] |
Mean density | 8.41 ± 1.43 g/cm3[3] |
Rotation period | 10.283 h (0.4285 d)[2] 10.12 h[4] |
Geometric albedo | 0.0465±0.002 |
DCX:[4] | |
Absolute magnitude (H) | 8.28 |
Medea (minor planet designation: 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.[5]
Photometric observations of this asteroid in 1987 gave an incomplete lightcurve 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.[4] Lightcurve data has also been recorded by observers at the Antelope Hill Observatory (H09), 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.[6]
Original source: https://en.wikipedia.org/wiki/212 Medea.
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