Discovery | |
---|---|
Discovered by | Kitt Peak National Obs. |
Discovery site | Kitt Peak National Obs. |
Discovery date | 17 April 1999 |
Designations | |
(118378) 1999 HT11 | |
1999 HT11 | |
TNO [1] · 4:7 res [2] | |
Orbital characteristics[1] | |
Epoch 13 January 2016 (JD 2457400.5) | |
Uncertainty parameter 4 | |
Observation arc | 5881 days (16.10 yr) |
Aphelion | 49.013 AU (7.3322 Tm) |
Perihelion | 38.894 AU (5.8185 Tm) |
43.954 AU (6.5754 Tm) | |
Eccentricity | 0.11511 |
291.41 yr (106436 d) | |
323.89° | |
0° 0m 12.176s / day | |
Inclination | 5.0533° |
87.910° | |
186.37° | |
Physical characteristics | |
Dimensions | 146 km[3] |
0.09? (assumed) | |
7.6 | |
(118378) 1999 HT11, provisional designation 1999 HT11, is a trans-Neptunian object in a 4:7 orbital resonance with Neptune.[2] It has a perihelion (closest approach to the Sun) at 38.858 AU and an aphelion (farthest approach from the Sun) at 49.231 AU. It is about 146 km in diameter. It was discovered on 17 April 1999, by astronomers at the Kitt Peak National Observatory, Arizona, in the United States.
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