(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]
| 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] | |
Orbit
editWith 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
editSpectral type
editThe object is estimated to have a bluish spectra (BB).[6]
Diameter
edit2013 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
edit2013 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- ^ 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.
- ^ 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.
- ^ a b c d Wm. Robert Johnston (15 October 2017). "List of Known Trans-Neptunian Objects". Johnston's Archive. Retrieved 10 November 2017.
- ^ a b c "505478 (2013 UT15)". Minor Planet Center. Retrieved 10 November 2017.
- ^ a b "Asteroid Size Estimator". CNEOS – NASA/JPL. Retrieved 9 November 2017.
- ^ a b c d e f "How many dwarf planets are there in the outer solar system?". Gps.caltech.edu. Retrieved 10 November 2017.
- ^ minorplanetcenter.net: q>30, a>150
- ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 10 November 2017.
External links
edit- MPEC 2017-M21 : 2013 UT15
- Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (505001)-(510000) – Minor Planet Center
- (505478) 2013 UT15 at AstDyS-2, Asteroids—Dynamic Site
- (505478) 2013 UT15 at the JPL Small-Body Database