156 Xanthippe
Xanthippe (minor planet designation: 156 Xanthippe) is a dark background asteroid from the central regions of the asteroid belt, approximately 120 kilometers (75 miles) in diameter. It was discovered on 22 November 1875, by Austrian astronomer Johann Palisa at the Austrian Naval Observatory, in what is now Croatia. It is named after Xanthippe, the wife of the Greek philosopher Socrates.
| Discovery | |
|---|---|
| Discovered by | J. Palisa |
| Discovery site | Austrian Naval Obs. |
| Discovery date | 22 November 1875 |
| Designations | |
| (156) Xanthippe | |
| Pronunciation | /zænˈθɪpiː/ |
Named after | Xanthippe (wife of Socrates) |
| A875 WA; 1901 SA; 1902 VA; 1936 FG1; 1942 RP; 1949 BN | |
| main-belt · (middle) background | |
| Orbital characteristics | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 116.46 yr (42,537 d) |
| Aphelion | 3.3475 AU |
| Perihelion | 2.1069 AU |
| 2.7272 AU | |
| Eccentricity | 0.2274 |
| 4.50 yr (1,645 d) | |
| 34.237° | |
| 0° 13m 7.68s / day | |
| Inclination | 9.7818° |
| 241.83° | |
| 338.29° | |
| Physical characteristics | |
Mean diameter | 110.409 km 110.718±2.187 km 115.49±1.74 km 116.34±4.14 km 120.99±2.5 km 121.68±41.10 km 122.02±31.66 km 143.346±0.903 km 143.35±0.90 km |
| Mass | (6.49±3.71)×1018 kg |
Mean density | 7.86±4.57 g/cm3 |
| 22 h 22.104±0.006 h 22.37±0.01 h 22.5 h | |
| 0.030±0.004 0.03±0.03 0.04±0.03 0.0422±0.002 0.047±0.002 0.0504±0.0120 0.0687 | |
| Tholen = C SMASS = Ch B–V = 0.713 U–B = 0.315 | |
| 8.31 8.31±0.09 8.64 8.65 8.83±0.30 | |
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