24 Themis
Deconvolved image of Themis by VLT-SPHERE | |
| Discovery | |
|---|---|
| Discovered by | Annibale de Gasparis |
| Discovery date | 5 April 1853 |
| Designations | |
| (24) Themis | |
| Pronunciation | /ˈθiːmɪs/ |
Named after | Themis |
| 1947 BA; 1955 OH | |
| Main belt (Themis) | |
| Adjectives | Themistian /θɪˈmɪstiən/ |
| Orbital characteristics | |
| Epoch 17.0 October 2024 (JD 2460600.5) | |
| Aphelion | 524.4 Gm (3.505 AU) |
| Perihelion | 415.9 Gm (2.780 AU) |
| 470.2 Gm (3.143 AU) | |
| Eccentricity | 0.1153 |
| 2035 d (5.57 yr) | |
| 346.1° | |
| Inclination | 0.7368° |
| 36.39° | |
| 109.0° | |
| Earth MOID | 1.79422 AU |
| Jupiter MOID | 1.50402 AU |
| TJupiter | 3.199 |
| Physical characteristics | |
| Dimensions | 232 × 220 × 176 ± 14 km |
| 208±3 km 198±20 km | |
| Flattening | 0.24 |
| Mass | (6.2±2.9)×1018 kg (1.13±0.43)×1019 kg 2.39×1019 kg |
Mean density | 1.31±0.62 g/cm3 2.78±1.35 g/cm3 |
Equatorial surface gravity | 0.15+0.08 −0.07 m/s2 |
Equatorial escape velocity | 87+15 −20 m/s |
| 0.34892 d (8 h 22 min) 8.374187±0.000001 h | |
| 18° | |
Pole ecliptic latitude | 73°±3° |
Pole ecliptic longitude | 146°±3° |
| 0.060 (calculated) 0.067 | |
| C/B (B-V=0.68) | |
| 7.24 7.08 | |
24 Themis is one of the largest asteroids in the asteroid belt. At roughly 200 kilometres (120 mi) in diameter, it is also the largest member of the Themistian family. It was discovered by Annibale de Gasparis on 5 April 1853. It is named after Themis, the personification of natural law and divine order in Greek mythology.