624 Hektor
624 Hektor /ˈhɛktər/ is the largest Jupiter trojan and the namesake of the Hektor family, with a highly elongated shape equivalent in volume to a sphere of approximately 225 to 250 kilometers diameter. It was discovered on 10 February 1907, by astronomer August Kopff at Heidelberg Observatory in southwest Germany, and named after the Trojan prince Hector, from Greek mythology. It has one small 12-kilometer sized satellite, Skamandrios, discovered in 2006.
624 Hektor and its moon Skamandrios | |
| Discovery | |
|---|---|
| Discovered by | A. Kopff |
| Discovery site | Heidelberg Obs. |
| Discovery date | 10 February 1907 |
| Designations | |
| (624) Hektor | |
| Pronunciation | /ˈhɛktər/ |
Named after | Hector (Greek mythology) |
| 1907 XM; 1948 VD | |
| Jupiter trojan · Hektor Greeks | |
| Adjectives | Hektorean or Hektorian (both /hɛkˈtɔːriən/) |
| Orbital characteristics | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 111.28 yr (40,646 d) |
| Aphelion | 5.3824 AU |
| Perihelion | 5.1319 AU |
| 5.2571 AU | |
| Eccentricity | 0.0238 |
| 12.05 yr (4,403 d) | |
| 136.09° | |
| 0° 4m 54.48s / day | |
| Inclination | 18.166° |
| 342.79° | |
| 185.22° | |
| Known satellites | 1 |
| Jupiter MOID | 0.2752 AU |
| TJupiter | 2.8990 |
| Physical characteristics | |
| Dimensions | 403 km × 201 km (derived) 370 km × 195 km × 195 km |
Mean diameter | 250±26 km (if bilobe: 256±12 km) 225 km 147±2 km 227±15 km 231±4 km |
| Mass | (7.9±1.4)×1018 kg (9.95±0.12)×1018 kg |
Mean density | 1.0±0.3 g/cm3 1.63±0.32 g/cm3 2.43±0.35 g/cm3 |
| 6.9205 hours (0.28835 d) | |
| 0.025 0.034±0.001 0.107±0.011 | |
| D (Tholen) | |
| 13.79 to 15.26 | |
| 7.20 · 7.3 · 7.49 | |
| 0.078" to 0.048" | |
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.