107 Camilla
Camilla (minor planet designation: 107 Camilla) is one of the largest asteroids from the outermost edge of the asteroid belt, approximately 250 kilometers (160 miles) in diameter. It is a member of the Sylvia family and located within the Cybele group. It was discovered on 17 November 1868, by English astronomer Norman Pogson at Madras Observatory, India, and named after Camilla, Queen of the Volsci in Roman mythology. The X-type asteroid is a rare trinary asteroid with two minor-planet moons discovered in 2001 and 2016, respectively. It is elongated in shape and has a short rotation period of 4.8 hours.
Lightcurve-based 3-D model of Camilla | |
| Discovery | |
|---|---|
| Discovered by | N. R. Pogson |
| Discovery site | Madras Obs. |
| Discovery date | 17 November 1868 |
| Designations | |
MPC designation | (107) Camilla |
| Pronunciation | /kəˈmɪlə/ |
Named after | Camilla (Roman mythology) |
Alternative designations | A868 WA, 1893 QA 1938 OG, 1949 HD1 |
Minor planet category | main-belt · (outer) Sylvia · Cybele |
| Adjectives | Camillian or Camillean, /kəˈmɪliən/ |
| Orbital characteristics | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 149.17 yr (54,485 d) |
| Aphelion | 3.7202 AU |
| Perihelion | 3.2622 AU |
Semi-major axis | 3.4912 AU |
| Eccentricity | 0.0656 |
Orbital period (sidereal) | 6.52 yr (2,383 d) |
Mean anomaly | 265.91° |
Mean motion | 0° 9m 3.96s / day |
| Inclination | 10.001° |
Longitude of ascending node | 172.61° |
| 306.77° | |
| Known satellites | 2 |
| Physical characteristics | |
| Dimensions | 285 km × 205 km × 170 km 344 km × 246 km × 205 km |
Mean diameter | 254±12 km 200.37±3.51 km 210.370±8.326 km 222.62±17.1 km 241.6±35.0 km 243.3±12.4 km |
| Mass | (11.2±0.1)×1018 kg |
Mean density | 1.28±0.04 g/cm3 1.40±0.30 g/cm3 |
Synodic rotation period | 4.844 h |
| 0.043±0.012 0.045±0.019 0.0525±0.009 0.059±0.012 0.065±0.003 | |
| X (SMASS) C (Tholen) P (WISE) B–V = 0.705 U–B = 0.298 | |
| 11.53 | |
| 7.08 7.1±0.02 | |
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