185 Eunike
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| Discovery | |
|---|---|
| Discovered by | C. H. F. Peters, 1878 |
| Designations | |
| Minor planet category | Main belt |
| Orbital characteristics | |
| Aphelion | 3.088 AU |
| Perihelion | 2.389 AU |
| Semi-major axis | 2.738 AU |
| Eccentricity | 0.128 |
| Orbital period | 4.53 years |
| Inclination | 23.25° |
| Physical characteristics | |
| Dimensions | 160.61 ± 5.00[1] km |
| Mass | (3.56 ± 2.61) × 1018[1] kg |
| Mean density | 1.64 ± 1.21[1] g/cm3 |
| Rotation period | 10.83 hours |
| Albedo | 0.064 |
| Spectral type | C |
| Absolute magnitude (H) | 7.62 |
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185 Eunike is a dark and very large main-belt asteroid, with an approximate diameter of 157 kilometres. It has a primitive carbonaceous composition.
It was discovered by C. H. F. Peters on March 1, 1878, in Clinton, New York and named after Eunike, a Nereid in Greek mythology whose name means 'happy victory'. The name was chosen to celebrate the Treaty of San Stefano (1878).
There have been three observed occultations of stars by Eunike.
References
- ↑ 1.0 1.1 1.2 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.
External links
- Orbital simulation from JPL (Java)
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