10370 Hylonome
10370 Hylonome (/haɪˈlɒnəmiː/; prov. designation: 1995 DW2) is a minor planet orbiting in the outer Solar System. The dark and icy body belongs to the class of centaurs and measures approximately 72 kilometers (45 miles) in diameter. It was discovered on 27 February 1995, by English astronomer David C. Jewitt and Vietnamese American astronomer Jane Luu at the U.S. Mauna Kea Observatory in Hawaii, and later named after the mythological creature Hylonome.
Hubble Space Telescope image of Hylonome taken in 2009 | |
| Discovery | |
|---|---|
| Discovered by | D. C. Jewitt J. X. Luu |
| Discovery site | Mauna Kea Obs. |
| Discovery date | 27 February 1995 |
| Designations | |
MPC designation | (10370) Hylonome |
| Pronunciation | /haɪˈlɒnəmiː/ |
Named after | Ὑλονόμη Hylonomē (Greek mythology) |
Alternative designations | 1995 DW2 |
Minor planet category | centaur · distant Neptune-crosser Uranus-grazer |
| Symbol | (astrological) |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 3 | |
| Observation arc | 15.27 yr (5,576 days) |
| Aphelion | 31.393 AU |
| Perihelion | 18.910 AU |
Semi-major axis | 25.152 AU |
| Eccentricity | 0.2482 |
Orbital period (sidereal) | 126.14 yr (46,073 days) |
Mean anomaly | 63.271° |
Mean motion | 0° 0m 28.08s / day |
| Inclination | 4.1443° |
Longitude of ascending node | 178.08° |
| 7.0279° | |
| Jupiter MOID | 13.4570 AU |
| TJupiter | 4.4550 |
| Physical characteristics | |
Mean diameter | 70±20 km 74±16 km |
| 0.051±0.030 | |
| BR (intermed. blue-red) | |
| 8.6 · 9.08±0.04 (R) · 9.250±0.131 (R) · 9.35 · 9.51±0.08 · 9.53 | |
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