2013 LA2
{{Use dmy dates|date=November 2018}}
{{DISPLAYTITLE:{{mp|2013 LA|2}}}}
{{Infobox planet
| minorplanet = yes
| name = {{mp|2013 LA|2}}
| background = #C7FF8F
| image =
| image_size =
| caption =
| discoverer = Pan-STARRS 1
| discovery_site = Pan-STARRS
| discovered = 1 June 2013
{{small|(first observed only)}}
| mpc_name = {{mp|2013 LA|2}}
| alt_names =
| pronounced =
| named_after =
| mp_category = {{nowrap|centaur{{·}}damocloid}}
unusual{{·}}main-belt
| epoch = 31 May 2020 (JD 2459000.5)
| uncertainty = 7
| observation_arc = 41 days
| aphelion = 8.331 AU
| perihelion = 3.0376 AU
| semimajor = 5.6841 AU
| eccentricity = 0.4656
| period = 13.55 yr (4,950 d)
| mean_anomaly = 197.7432°
| mean_motion = {{Deg2DMS|0.0727|sup=ms}} / day
| inclination = 175.09°
| asc_node = 243.90°
| arg_peri = 325.17°
| jupiter_moid = 0.1752 AU
| tisserand = –0.928
| mean_diameter = {{val|1.8|ul=km}} {{small|(est.)}}
| rotation =
| albedo = 0.09 {{small|(assumed)}}
| spectral_type =
}}
{{mp|2013 LA|2}} is a centaur and damocloid on a cometary-like and retrograde orbit from the outer Solar System, suggesting that it is an extinct comet. It was first observed on 1 June 2013 by astronomers with the Pan-STARRS survey at Haleakala Observatory, Hawaii, in the United States. The object measures approximately {{convert|1.8|km|mi|abbr=off|sigfig=2|sp=us}} in diameter. It holds the record for having the highest orbital inclination of any known minor planet.
Orbit and classification
{{mp|2013 LA|2}} orbits the Sun at a distance of 3.0–12.0 AU once every 20 years and 7 months (7,519 days; semi-major axis of 7.51 AU). Its orbit has an eccentricity of 0.59 and an inclination of 175° with respect to the ecliptic.
It has the highest orbital inclination of any known minor planet which gives it a retrograde orbit. The objects's orbit takes it from the outer region of the asteroid belt to between the orbit of Saturn (9.5 AU) and Uranus (19.2 AU). The body's short observation arc of less than a month begins with its first observation on 1 June 2013. It has not since been observed.
Physical characteristics
Johnston's archive assumes an albedo 0.09 and calculates a diameter of 1.8 kilometers.
See also
- {{section link|List of notable asteroids|Retrograde and highly inclined}}
References
{{reflist|30em|refs=
|type = 2013-06-26 last obs.
|title = JPL Small-Body Database Browser: (2013 LA2)
|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=3639499
|publisher = Jet Propulsion Laboratory
|accessdate = 20 November 2018}}
|title = 2013 LA2
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=2013+LA2
|accessdate = 20 November 2018}}
|title = List Of Other Unusual Objects
|work = Minor Planet Center
|date = 14 November 2018
|url = https://www.minorplanetcenter.net/iau/lists/t_others.html
|accessdate = 19 November 2018}}
|title = List of Known Trans-Neptunian Objects
|work = Johnston's Archive
|date = 7 October 2018
|last = Johnston |first= Wm. Robert
|url = http://www.johnstonsarchive.net/astro/tnoslist.html
|accessdate = 19 November 2018}}
}}
External links
- {{JPL small body|id=3639499}}
{{Small Solar System bodies}}
{{Authority control}}
{{DEFAULTSORT:2013 LA2}}