(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]

(505478) 2013 UT15
Discovery[1]
Discovered byOSSOS
Discovery siteMauna Kea Obs.
Discovery date2 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 arc4.08 yr (1,489 days)
Aphelion347.97 AU
Perihelion43.853 AU
195.91 AU
Eccentricity0.7762
2742.19 yr (1,001,586 days)
353.50°
0° 0m 1.44s / day
Inclination10.682°
191.97°
252.40°
Physical characteristics
Dimensions243 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]

Orbit

edit

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.

Physical characteristics

edit

Spectral type

edit

The object is estimated to have a bluish spectra (BB).[6]

Diameter

edit

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]

Numbering and naming

edit

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]

References

edit
  1. ^ a b c d e f "JPL Small-Body Database Browser: 505478 (2013 UT15)" (2017-08-30 last obs.). Jet Propulsion Laboratory. Retrieved 10 November 2017.
  2. ^ Shankman, Cory; et al. (2017). "OSSOS. VI. Striking Biases in the Detection of Large Semimajor Axis Trans-Neptunian Objects". The Astronomical Journal. 154 (2): 50. arXiv:1706.05348. Bibcode:2017AJ....154...50S. doi:10.3847/1538-3881/aa7aed. hdl:10150/625487. S2CID 3535702.
  3. ^ a b c d Wm. Robert Johnston (15 October 2017). "List of Known Trans-Neptunian Objects". Johnston's Archive. Retrieved 10 November 2017.
  4. ^ a b c "505478 (2013 UT15)". Minor Planet Center. Retrieved 10 November 2017.
  5. ^ a b "Asteroid Size Estimator". CNEOS – NASA/JPL. Retrieved 9 November 2017.
  6. ^ a b c d e f "How many dwarf planets are there in the outer solar system?". Gps.caltech.edu. Retrieved 10 November 2017.
  7. ^ minorplanetcenter.net: q>30, a>150
  8. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 10 November 2017.
edit