2015 KG163

2015 KG163
The orbit of 2015 KG163 (right side, in orange) and other extreme detached objects, along with the hypothetical Planet Nine's orbit on the right
Discovery [1]
Discovered by OSSOS
Discovery site Mauna Kea Obs.
(first observed only)
Discovery date 24 May 2015
Designations
MPC designation 2015 KG163
o5m52
TNO [1] · E-SDO
sednoid [2] · detached
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 3
Observation arc 2.02 yr (739 days)
Earliest precovery date 17 May 2015-05
Aphelion 1581.43 AU
1320 AU (barycentric)
Perihelion 40.505 AU
810.97 AU
Eccentricity 0.9501
23094 yr (8,435,325 d)
17700 yr (barycentric)
359.93°
0° 0m 0s / day
Inclination 13.967°
219.06°
32.006°
Physical characteristics
Dimensions 101 km (Johnston)[2]
104 km (Brown)[3]
0.08 (estimate)[3]
8.265[1]

    2015 KG163, also known as o5m52, is a trans-Neptunian object from the outermost region of the Solar System, approximately 102 kilometers (63 miles) in diameter. It was first observed on 24 May 2015, by astronomers of the Outer Solar System Origins Survey using the Canada–France–Hawaii Telescope at Mauna Kea Observatories, Hawaii, United States.[4]

    It is one a small number of detached objects with perihelion distances of 30 AU or more, and semi-major axes of 250 AU or more.[5] Such objects can not reach such orbits without some perturbing object, which lead to the speculation of Planet Nine. Its argument of perihelion is similar to that of 2013 FT28.

    Closeup of current position near perihelion, passing downward from the upper left of this view

    References

    1. 1 2 3 4 "JPL Small-Body Database Browser: (2015 KG163)" (2017-05-25 last obs.). Jet Propulsion Laboratory. Retrieved 1 November 2017.
    2. 1 2 "List of known trans-Neptunian objects". Johnstonsarchive.net. 5 September 2016. Retrieved 1 November 2017.
    3. 1 2 Michael E. Brown. "How many dwarf planets are there in the outer solar system? (updates daily)". California Institute of Technology. Retrieved 1 November 2017.
    4. ↑ "2015 KG163". Minor Planet Center. Retrieved 1 November 2017.
    5. ↑ "MPC-query: a>250 and q<30". Minor Planet Center. Retrieved 1 November 2017.

    This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.