Discovery [1] | |
---|---|
Discovered by | OSSOS |
Discovery site | Mauna Kea Obs. |
Discovery date | 2 August 2013 |
Designations | |
(505478) 2013 UT15 | |
o3L83 [2] | |
TNO
[1] ·
SDO
[3] detached · distant [4] | |
Orbital characteristics [1] | |
Epoch 4 September 2017 ( JD 2458000.5) | |
Uncertainty parameter 4 | |
Observation arc | 4.08 yr (1,489 days) |
Aphelion | 347.97 AU |
Perihelion | 43.853 AU |
195.91 AU | |
Eccentricity | 0.7762 |
2742.19 yr (1,001,586 days) | |
353.50 ° | |
0° 0m 1.44s / day | |
Inclination | 10.682° |
191.97° | |
252.40° | |
Physical characteristics | |
Dimensions | 243 km estimate)
[3] 260 km (est. at 0.08) [5] 340 km estimate) [6] |
0.04 (estimate)
[6] 0.09 (assumed) [3] | |
BB (estimate) [6] | |
6.2951 [1] · 6.4 [6] | |
(505478) 2013 UT15 is an extreme trans-Neptunian object from the scattered disc, located in the outermost regions of the Solar System, approximately 260 kilometers (160 miles) in diameter. It was discovered on 2 August 2013, by astronomers of the Outer Solar System Origins Survey at Mauna Kea Observatory, Hawaii, United States. [4]
With a semi-major axis of 196 AU, 2013 UT15 orbits the Sun at a distance of 43.9–348 AU once every 2,742 years. Its orbit has an eccentricity of 0.78 and an inclination of 11 ° with respect to the ecliptic. [1] It has a similar orbit to (148209) 2000 CR105, except for a smaller inclination.
2013 UT15 belongs to a small number of detached objects with perihelion distances of 30 AU or more, and semi-major axes of 150 AU or more. [7] Such objects can not reach such orbits without some perturbing object, which lead to the speculation of planet nine.
The object is estimated to have a bluish spectra ( BB). [6]
2013 UT15 has been estimated to measure 243 and 340 kilometers in diameter, based on an assumed albedo of 0.09 and 0.04, respectively. [3] [6] A generic magnitude-to-diameter conversion gives a mean-diameter of 260 kilometers, [5] using with a typical albedo of 0.08 and a published absolute magnitude of 6.2951. [1]
2013 UT15 was numbered (505478) by the Minor Planet Center on 4 November 2017 ( M.P.C. 107067). [8] As of 2017, this minor planet has not received a name. [4]