2013 UH15
{{Use dmy dates|date=October 2018}}
{{DISPLAYTITLE:{{mp|2013 UH|15}}}}
{{Infobox planet
| minorplanet = yes
| name = {{mp|2013 UH|15}}
| background = #C2E0FF
| image =
| image_size =
| caption =
| discoverer = {{small|(first observed only)}}
Las Campanas Obs.
| discovery_site = Las Campanas Obs.
| discovered = 29 October 2013
| mpc_name = {{mp|2013 UH|15}}
| alt_names =
| pronounced =
| named_after =
| mp_category = TNO{{·}}ESDO
distant{{·}}ETNO
| epoch = 27 April 2019 (JD 2458600.5)
| uncertainty = 5
| observation_arc = 1.96 yr (717 d)
| aphelion = 305.39 AU
| perihelion = 35.018 AU
| semimajor = 170.20 AU
| eccentricity = 0.7943
| period = 2221 yr (811,042 d)
| mean_anomaly = 353.91°
| mean_motion = {{Deg2DMS|0.0004|sup=ms}} / day
| inclination = 26.090°
| asc_node = 176.55°
| arg_peri = 282.97°
| neptune_moid = 12.9 AU
| mean_diameter = {{val|128|ul=km}} {{small|(est.)}}
{{val|130|u=km}} {{small|(est.)}}
| rotation =
| albedo = 0.08 {{small|(assumed)}}
0.09 {{small|(assumed)}}
| spectral_type =
}}
{{mp|2013 UH|15}} is an extreme trans-Neptunian object from the extended scattered disc in the outermost region of the Solar System, approximately {{convert|130|km|mi|abbr=off|sigfig=2|sp=us}} in diameter. It was first observed on 29 October 2013, by astronomers at the Las Campanas Observatory in the southern Atacama Desert of Chile. The detached extended scattered disc object (ESDO) is on a highly eccentric orbit and belongs to the extreme trans-Neptunian objects.
Orbit and classification
{{mp|2013 UH|15}} orbits the Sun at a distance of 35.0–305 AU once every 2221 years (811,042 days; semi-major axis of 170.2 AU). Its orbit has an exceptionally high eccentricity of 0.79 and an inclination of 26° with respect to the ecliptic. The body's observation arc begins with its official first observation at Las Campanas in October 2013. It has a minimum orbital intersection distance with Neptune of 12.9 AU.
It belongs to a small group of detached objects with perihelion distances of 30 AU or more, and semi-major axes of 150 AU or more. These extreme trans-Neptunian objects (ETNOs) can not reach such orbits without some perturbing object, which lead to the speculation of Planet Nine.
Numbering and naming
As of 2018, this minor planet has neither been numbered nor named by the Minor Planet Center. The official discoverers will be defined when the object is numbered.
Physical characteristics
According to the Johnston's archive and to American astronomer Michael Brown, {{mp|2013 UH|15}} measures 128 and 130 kilometers in diameter based on an assumed albedo of 0.09 and 0.08, respectively. Due to its small size, it is listed as "probably not" a dwarf planet (100–200 km) on Michael Brown's website, which uses a 5-class taxonomic system that ranges from "nearly certainly" to "possibly" for potential dwarf planet candidates. As of 2018, no rotational lightcurve has been obtained from photometric observations. The body's rotation period, pole and shape remain unknown.
See also
- {{Section link|List of unnumbered trans-Neptunian objects|2013 UH15}}
References
{{reflist|30em|refs=
|type = 2015-10-16 last obs.
|title = JPL Small-Body Database Browser: (2013 UH15)
|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=3757871
|publisher = Jet Propulsion Laboratory
|accessdate = 26 October 2018}}
|title = 2013 UH15
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=2013+UH15
|accessdate = 26 October 2018}}
|title = List Of Centaurs and Scattered-Disk Objects
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/iau/lists/t_centaurs.html
|accessdate = 25 October 2018}}
|title = Database Query: objects q>30, a>150
|work = Minor Planet Center
|url = http://minorplanetcenter.net/db_search/show_by_properties?perihelion_distance_min=30&semimajor_axis_min=150
|accessdate = 25 October 2018}}
|title = List of Known Trans-Neptunian Objects
|publisher = Johnston's Archive
|date = 7 October 2018
|url = https://www.johnstonsarchive.net/astro/tnoslist.html
|accessdate = 25 October 2018}}
|title = How many dwarf planets are there in the outer solar system?
|publisher = California Institute of Technology
|last = Brown |first= Michael E.
|url = https://web.gps.caltech.edu/~mbrown/dps.html
|accessdate = 25 October 2018}}
|title = LCDB Data for (2013+UH15)
|publisher = Asteroid Lightcurve Database (LCDB)
|url = https://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=0%7C2013+UH15
|accessdate = 26 October 2018}}
}}
External links
- [https://www.minorplanetcenter.net/iau/lists/t_centaurs.html List Of Centaurs and Scattered-Disk Objects], Minor Planet Center
- {{AstDys|2013UH15}}
- {{JPL small body|id=3757871}}
{{Trans-Neptunian objects}}
{{Small Solar System bodies}}
{{Authority control}}
{{DEFAULTSORT:2013 UH15}}