(118378) 1999 HT11
(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.
| 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 | |
References
- "JPL Small-Body Database Browser: 118378 (1999 HT11)". NASA/Jet Propulsion Laboratory. Retrieved 7 April 2016.
- Marc W. Buie (2005-05-10). "Orbit Fit and Astrometric record for 118378". (using 25 observations) SwRI (Space Science Department). Archived from the original on 2010-08-08. Retrieved 2009-01-29.
- List of known trans-Neptunian objects Archived June 21, 2007, at WebCite
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