View source for Astronomy:(549948) 2011 WL2

{{DISPLAYTITLE:{{mp|(549948) 2011 WL|2}}}}
{{Infobox planet
|minorplanet     = yes
|background      = #FFC2E0
|name            = {{mp|(549948) 2011 WL|2}}
|image           = 
|caption         = 
|discovery_ref   = <ref name="discovery ref">{{cite web|title=2011 WL2|url=http://www.minorplanetcenter.net/db_search/show_object?object_id=549948|publisher=[[Organization:Minor Planet Center|Minor Planet Center]]|date=2012-12-06}}</ref>
|discoverer      = [[Astronomy:Lincoln Near-Earth Asteroid Research|LINEAR]]
|discovered      = 16 November 2011
|discovery_site  = Lincoln Laboratory ETS
|mpc_name        = {{mp|(549948) 2011 WL|2}}
|mp_category     = {{mpcat|Apollo}}<br />[[Astronomy:Near-Earth object|NEO]], [[Astronomy:Potentially hazardous object|PHA]]
|alt_names       = 2011 WL2
|orbit_ref       = <ref name="orbit">{{cite web|type=last observation: 2012-12-06; [[Astronomy:Observation arc|arc]]: 386 days|title=JPL Small-Body Database Browser: 2011 WL2)|url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2011%20WL2;old=0;orb=0;cov=0;log=0;cad=1#cad|publisher=[[Organization:Jet Propulsion Laboratory|Jet Propulsion Laboratory]]|accessdate=1 April 2016}}</ref>
|epoch           = 13 January 2016 ([[Astronomy:Julian day|JD]] 2457400.5)
|uncertainty     = 2
|observation_arc = 386 days (1.06 yr)
|aphelion        = {{Convert|1.3833510|AU|Gm|abbr=on|lk=on}}
|perihelion      = {{Convert|0.7723798|AU|Gm|abbr=on}}
|semimajor       = {{Convert|1.0778654|AU|Gm|abbr=on}}
|eccentricity    = 0.283417
|period          = 1.12 [[Astronomy:Julian year|yr]] (408.74 [[Astronomy:Julian year|d]])
|avg_speed       = 28.10406 km/s
|inclination     = 14.12974°
|asc_node        = 212.9462°
|mean_anomaly    = 336.9187[[Degree (angle)|°]]
|arg_peri        = 88.83006°
|moid            = {{Convert|0.00141998|AU|km|abbr=on}}
|mercury_moid    = 
|mean_diameter   = 190–420 m<ref>{{cite web|title=ABSOLUTE MAGNITUDE (H)|url=http://neo.jpl.nasa.gov/glossary/h.html|archive-url=https://web.archive.org/web/20010302182040/http://neo.jpl.nasa.gov/glossary/h.html|url-status=dead|archive-date=2001-03-02|publisher=[[Organization:NASA|NASA]]}}</ref>
|albedo          = 
|spectral_type   = 
|abs_magnitude   = 20.8<ref name="orbit"/>
|mean_motion     = {{Deg2DMS|0.8807594|sup=ms}} /day
|jupiter_moid    = {{Convert|3.83997|AU|Gm|abbr=on}}
}}

'''{{mp|(549948) 2011 WL|2}}''' is a sub-kilometer [[Astronomy:Asteroid|asteroid]], classified as a [[Astronomy:Near-Earth object|near-Earth object]] and [[Astronomy:Potentially hazardous asteroid|potentially hazardous asteroid]] of the [[Astronomy:Apollo asteroid|Apollo group]]. It was discovered on 16 November 2011, by astronomers with the LINEAR at the Lincoln Laboratory ETS near Socorro, New Mexico, in the United States.

==Orbit==
{{mp|2011 WL|2}} is a potentially hazardous asteroid (PHA), but has a well determined orbit with a 10 year [[Astronomy:Observation arc|observation arc]]. {{mp|2011 WL|2}} will pass at a distance of {{convert|0.0056|AU|km mi|abbr=on}} from Earth on 25 October 2077.<ref name="orbit"/> For comparison, the distance to the [[Astronomy:Moon|Moon]] is about 0.0026 AU (384,400&nbsp;km). {{mp|2011 WL|2}} appears on the list of PHA close approaches issued by the [[Organization:Minor Planet Center|Minor Planet Center]] (MPC), with the next close approach in the year 2038.<ref>{{cite web|title=PHA Close Approaches To The Earth|url=http://www.minorplanetcenter.net/iau/lists/PHACloseApp.html|publisher=[[Organization:Minor Planet Center|Minor Planet Center]]|accessdate=2015-05-29}}</ref>

The [[Astronomy:Tisserand's parameter|Jupiter Tisserand invariant]], used to distinguish different kinds of orbits, is 5.7.<ref name="orbit"/>

==References==
{{reflist}}

== External links ==
* {{NeoDys|549948}}
* {{ESA-SSA|549948}}
* {{JPL small body}}

{{Minor planets navigator | |number=549948 |PageName={{mp|(549948) 2011 WL|2}} | }}
{{Small Solar System bodies}}
{{2011 in space}}

{{DEFAULTSORT:2011 WL2}}
[[Category:Apollo asteroids|549948]]
[[Category:Potentially hazardous asteroids|549948]]

{{Sourceattribution|(549948) 2011 WL2}}