Astronomy:(505478) 2013 UT15

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(505478) 2013 UT15
Discovery[1]
Discovered byOSSOS
Discovery siteMauna Kea Obs.
Discovery date2 August 2013
Designations
(505478) 2013 UT15
o3L83[2]
Minor planet categoryTNO[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)
|{{{apsis}}}|helion}}347.97 AU
|{{{apsis}}}|helion}}43.853 AU
195.91 AU
Eccentricity0.7762
Orbital period2742.19 yr (1,001,586 days)
Mean anomaly353.50°
Mean motion0° 0m 1.44s / day
Inclination10.682°
Longitude of ascending node191.97°
252.40°
Physical characteristics
Dimensions243 km estimate)[3]
260 km (est. at 0.08)[5]
340 km estimate)[6]
Geometric albedo0.04 (estimate)[6]
0.09 (assumed)[3]
BB (estimate)[6]
Absolute magnitude (H)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]

Orbit

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

Spectral type

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

Diameter

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

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

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 "JPL Small-Body Database Browser: 505478 (2013 UT15)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2505478. Retrieved 10 November 2017. 
  2. ↑ Shankman, Cory (2017). "OSSOS. VI. Striking Biases in the Detection of Large Semimajor Axis Trans-Neptunian Objects". The Astronomical Journal 154 (2): 50. doi:10.3847/1538-3881/aa7aed. Bibcode: 2017AJ....154...50S. https://pure.qub.ac.uk/portal/en/publications/ossos-vi-striking-biases-in-the-detection-of-large-semimajor-axis-transneptunian-objects(027b7a9c-a171-42b4-9449-9355b0a255d4).html. 
  3. ↑ 3.0 3.1 3.2 3.3 Wm. Robert Johnston (15 October 2017). "List of Known Trans-Neptunian Objects". Johnston's Archive. http://www.johnstonsarchive.net/astro/tnoslist.html. Retrieved 10 November 2017. 
  4. ↑ 4.0 4.1 4.2 "505478 (2013 UT15)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=505478. Retrieved 10 November 2017. 
  5. ↑ 5.0 5.1 "Asteroid Size Estimator". CNEOS – NASA/JPL. https://cneos.jpl.nasa.gov/tools/ast_size_est.html. Retrieved 9 November 2017. 
  6. ↑ 6.0 6.1 6.2 6.3 6.4 6.5 "How many dwarf planets are there in the outer solar system?". Gps.caltech.edu. http://web.gps.caltech.edu/~mbrown/dps.html. Retrieved 10 November 2017. 
  7. ↑ minorplanetcenter.net: q>30, a>150
  8. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html. Retrieved 10 November 2017. 

External links



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