156 Xanthippe
| Discovery | |
|---|---|
| Discovered by | Johann Palisa |
| Discovery date | 22 November 1875 |
| Designations | |
| MPC designation | (156) Xanthippe |
| 1936 FG1, 1942 RP, 1949 BN, A901 SA, A902 VA | |
| Main belt | |
| Orbital characteristics | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 114.52 yr (41828 d) |
| Aphelion | 3.34678 AU (500.671 Gm) |
| Perihelion | 2.10673 AU (315.162 Gm) |
| 2.72675 AU (407.916 Gm) | |
| Eccentricity | 0.22738 |
| 4.50 yr (1644.6 d) | |
|
Average orbital speed
|
17.80 km/s |
| 262.802° | |
| 0° 13m 8.022s / day | |
| Inclination | 9.77921° |
| 241.845° | |
| 338.430° | |
| Earth MOID | 1.1012 AU (164.74 Gm) |
| Jupiter MOID | 1.6659 AU (249.22 Gm) |
| Jupiter Tisserand parameter | 3.298 |
| Physical characteristics | |
| Dimensions |
120.99±2.5 km 116.34 ± 4.14 km |
| Mass | (6.49 ± 3.71) × 1018 kg |
|
Mean density
|
7.86 ± 4.57 g/cm3 |
|
Equatorial surface gravity
|
0.0338 m/s² |
|
Equatorial escape velocity
|
0.0640 km/s |
| 22.37 h (0.932 d) | |
|
Sidereal rotation period
|
22.37 hours |
|
0.0422±0.002 0.0687 ± 0.0152 |
|
| Temperature | ~168 K |
| C (Tholen) | |
| 8.64, 8.310 | |
156 Xanthippe is a large, dark main-belt asteroid that was discovered by Austrian astronomer J. Palisa on November 22, 1875. It is named after Xanthippe, the wife of the Greek philosopher Socrates.
Photometric observations of this asteroid at the European Southern Observatory in La Silla, Chile during 1981 gave a light curve with a period of 22.5 hours. Based upon its spectrum this is classified as a C-type asteroid, indicating that it likely has a carbonaceous composition. The estimated size of this object is 116 km.
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