(674118) 2015 KH162
| Discovery [1] | |
|---|---|
| Discovered by | S. Sheppard D. Tholen C. Trujillo |
| Discovery site | Mauna Kea Obs. |
| Discovery date | 18 May 2015 |
| Designations | |
| 2015 KH162 | |
| TNO [1] · SDO [2] · p-DP [3] | |
| Orbital characteristics [1][4][5] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 4 | |
| Observation arc | 4.77 yr (1,741 days) |
| Aphelion | 82.986 AU |
| Perihelion | 41.577 AU |
| 62.282 AU | |
| Eccentricity | 0.3324 |
| 491.53 yr (179,531 days) | |
| 63.364° | |
| 0° 0m 7.2s / day | |
| Inclination | 28.787° |
| 200.81° | |
| 296.73° | |
| Physical characteristics | |
| Dimensions | 619 km[3] 735 km[2] |
| 0.11 (assumed)[3] | |
| 21.4 (R)[5] | |
| 3.9[1] · 4.3[3] | |
2015 KH162 is a large trans-Neptunian object and likely dwarf planet orbiting in the scattered disc region of the outermost Solar System. It measures approximately 700 kilometers in diameter.[1][2][3]
Orbit
2015 KH162 orbits the Sun at a distance of 41.6–83.0 AU once every 491 years and 6 months (179,531 days). Its orbit has an eccentricity of 0.33 and an inclination of 29° with respect to the ecliptic.[1]
Discovery
It was first observed on 18 May 2015, in the constellation of Serpens by astronomers at the Mauna Kea Observatories using the Subaru telescope. The discovery was announced by Scott Sheppard, David Tholen and C. Trujillo on 23 February 2016. At the time, this minor planet was at a distance of 59.0 AU from the Sun and had a relatively bright magnitude of 21.4 for its enormous distance.[4][5]
References
- ^ a b c d e f "JPL Small-Body Database Browser: (2015 KH162)" (2016-02-05 last obs.). Jet Propulsion Laboratory. Retrieved 2 August 2017.
- ^ a b c "List of Known Trans-Neptunian Objects". Johnston's Archive. 22 July 2017. Retrieved 2 August 2017.
- ^ a b c d e "How many dwarf planets are there in the outer solar system?". Mike Brown. Retrieved 2 August 2017.
- ^ a b "2015 KH162". Minor Planet Center. Retrieved 2 August 2017.
- ^ a b c "MPEC 2016-D40 : 2015 KH162". www.minorplanetcenter.net.
External links
- List Of Centaurs and Scattered-Disk Objects, Minor Planet Center
- (674118) 2015 KH162 at AstDyS-2, Asteroids—Dynamic Site
- (674118) 2015 KH162 at the JPL Small-Body Database
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