53311 Deucalion
53311 Deucalion /djuːˈkeɪliən/ (provisional designation 1999 HU11) is a trans-Neptunian object from the classical Kuiper belt, with a diameter of approximately 130–210 kilometers (81–130 miles), located in the outermost region of the Solar System. The cubewano belongs to the cold population and was discovered on 18 April 1999, by the Deep Ecliptic Survey at the Kitt Peak National Observatory in Arizona, United States. It was named after Deucalion, from Greek mythology.
| Discovery | |
|---|---|
| Discovered by | DES |
| Discovery site | Kitt Peak National Obs. |
| Discovery date | 18 April 1999 |
| Designations | |
MPC designation | (53311) Deucalion |
| Pronunciation | /djuːˈkeɪliən, -ɒn/ |
Named after | Δευκαλίων Deukălĭōn (Greek mythology) |
Alternative designations | 1999 HU11 |
Minor planet category | TNO · cubewano cold |
| Adjectives | Deucalionean Deucalionian /djuːkæliˈoʊniən/ |
| Orbital characteristics | |
| Epoch 27 April 2019 (JD 2458600.5) | |
| Uncertainty parameter 4 · 3 | |
| Observation arc | 15.04 yr (5,492 d) |
| Aphelion | 47.371 AU |
| Perihelion | 41.419 AU |
Semi-major axis | 44.395 AU |
| Eccentricity | 0.0670 |
Orbital period (sidereal) | 295.81 yr (108,044 d) |
Mean anomaly | 307.41° |
Mean motion | 0° 0m 11.88s / day |
| Inclination | 0.3720° |
Longitude of ascending node | 51.363° |
| 237.36° | |
| Physical characteristics | |
Mean diameter | 131 km (est.) 212 km (est.) |
| 0.09 (assumed) 0.20 (assumed) | |
| 6.6 | |
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