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(308242) 2005 GO21: Difference between revisions





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{{DISPLAYTITLE:{{mp|(308242) 2005 GO<sub>|21</sub>}}}}
{{Use dmy dates|date=September 2020}}
{{Infobox planet
| widthminorplanet = 25emyes
| bgcolourbackground = #FFFFC0FFC2E0
| name = {{mp|(308242) 2005 GO|21}}
| image = [[File:2005GO21-20120617.jpg|220px]]
| image_scale =
| caption = [[Goldstone Deep Space Communications Complex|Goldstone]] [[radar astronomy|radar]] image of asteroid {{mp|2005 GO|21}}<br />takenon 17 June 2012.
| discovery = yes
| discovery_ref = <ref name="MPEC2005-G31"/>
| discoverer = [[Siding Spring Survey]]|Siding ([[ListSpring of observatory codes#E00-E99|E12]])<br>0Srvy.5-m [[Uppsala Southern Schmidt Telescope|Uppsala Schmidt]]
| discovery_site = [[Siding Spring Observatory|Siding Spring Obs.]]
| discovered = 20051 April 12005
| mp_namempc_name = {{mp|(308242) 2005 GO|21}}
| mp_category = [[Aten asteroid|Aten]] {{·}}[[Near-Earth object|NEO]],<br>{{·}}[[Potentially hazardous object|PHA]]<ref name="jpldata"/>
| orbit_ref = <ref name="jpldata"/>
| epoch = 2012-Mar-14<br>13 January 2016 ([[UncertaintyJulian Parameter Uday|UncertaintyJD]]=0)<ref name=jpldata/>2457400.5)
| uncertainty = 0
| aphelion = 1.0095 [[Astronomical unit|AU]] (Q)
| perihelionobservation_arc = 0.497163385 AUdays (q9.27 yr)
| aphelion = {{Convert|1.0093|AU|Gm|abbr=on|lk=on}}
| semimajor = 0.75333 AU (a)
| perihelion = {{Convert|0.49720|AU|Gm|abbr=on}}
| eccentricity = 0.34005▼
| semimajor = {{Convert|0.75324|AU|Gm|abbr=on}}
| period = 0.65 [[Julian year (astronomy)|yr]]▼
▲| eccentricity = 0.3400533992
| inclination = 24.915[[degree (angle)|°]]▼
▲| period = 0.65 [[Julian year (astronomy)|yr]] (238.8 [[Julian year (astronomy)|d]])
| asc_node = 272.71°
| mean_anomalyinclination = 6924.001926° (M)
| arg_periasc_node = 156272.5770°
▲| inclinationmean_anomaly = 2419.915462[[degreeDegree (angle)|°]]
| satellites =
| mean_motion = 1.5077°/day
| physical_characteristics = yes
| arg_peri = 156.62°
| dimensions = ~1.6 km<ref name="Goldstone"/>▼
| moid = {{Convert|0.0452219|AU|Gm|abbr=on}}
| mass =
▲| dimensionsmean_diameter = ~1.6 km<ref name="Goldstone"/>
| density =
| sidereal_dayrotation = {{val|11.00|ul=h}}<ref hrname="jpldata"/><ref name="Goldstone"/>
| albedo =
| spectral_type =
| magnitude =
| abs_magnitude = 16.45<ref name="jpldata"/>
}}
 
'''{{mp|(308242) 2005 GO|21}}''' is a large [[Aten asteroid|Aten]] [[Near-Earth asteroid|near-Earth]] [[asteroid]] and [[potentially hazardous object]].<ref name=jpldata/> It has a well determined orbit with an observation arc of 7 years and an [[Uncertainty Parameter U|uncertainty parameter]] of 0.<ref name=jpldata/> It was discovered on 1 April 2005 by the [[Siding Spring Survey]] at an [[apparent magnitude]] of 18.1 using the {{convert|0.5|m|in|adj=on}} [[Uppsala Southern Schmidt Telescope]].<ref name="MPEC2005-G31"/>
 
Based on an [[Absolute magnitude#Solar System bodies (H)|absolute magnitude]] of 16.4,<ref name="jpldata"/> the asteroid has an estimated diameter of 1.6&nbsp;km (within a factor of two).<ref name=Goldstone/> {{mp|(308242) 2005 GO|21}} is the largest [[potentially hazardous asteroid]] (PHA) discovered in 2005.<ref name="jpl-search"/> On 21 June 2012 it passed Earth at a distance of {{convert|0.043963|AU|km mi|abbr=on|lk=on}}.<ref name=jpl-close/> The 2012 passage was studied with [[radar astronomy|radar]] using [[Goldstone Deep Space Communications Complex|Goldstone]] and [[Arecibo Observatory|Arecibo]].<ref name="Goldstone"/>
 
== References ==
{{reflist|refs=
| refs =
 
<ref name="MPEC2005-G31">{{cite web
|title=MPEC 2005-G31 : 2005 GO21
|publisher=[[IAU Minor Planet Center]]
|date=2005-04-05
|url=httphttps://www.minorplanetcenter.net/mpec/K05/K05G31.html
|accessdate=2012-06-18}} (K05G21O)</ref>
 
<ref name=jpldata>{{cite web
|datetype=last observation: 2012-06-17; last[[Observation obs (arc=|arc]]: 7.21 years)
|title=JPL Small-Body Database Browser: 308242 (2005 GO21)
|url=httphttps://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2005GO21
|publisher=[[Jet Propulsion Laboratory]]
|accessdate=2012-06-187 April 2016}}</ref>
 
<ref name="Goldstone">{{cite web
Line 72 ⟶ 73:
 
<ref name=jpl-close>{{cite web
|datetype=last observation: 2012-06-17; last[[Observation obs (arc=|arc]]: 7.21 years)
|title=JPL Close-Approach Data: 308242 (2005 GO21)
|url=httphttps://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2005GO21;cad=1#cad
|accessdate=2012-06-18}}</ref>
 
}} <!-- end of reflist -->
}}
 
== External links ==
* {{NeoDys|308242}}
* [http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2005GO21;orb=1 Orbital simulation] from JPL (Java) / [http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=2005GO21 Ephemeris]
* {{ESA-SSA|308242|2005GO21}}
* {{JPL small body|id=308242}}
 
{{Minor planets navigator| |number=308242 |PageName={{mp|(308242) 2005 GO|21}} | }}
[[Category:Aten asteroids]]▼
{{Small Solar System bodies}}
[[Category:Near-Earth asteroids]]▼
{{Authority control}}
[[Category:Radar imaged asteroids]]▼
[[Category:Astronomical objects discovered in 2005]]▼
 
[[fr{{DEFAULTSORT:(308242) 2005 GO21]]}}
▲[[Category:Aten asteroids|308242]]
[[Category:Discoveries by SSS|308242]]
▲[[Category:RadarPotentially imagedhazardous asteroids|308242]]
▲[[Category:NearRadar-Earthimaged asteroids|308242]]
[[Category:Near-Earth objects in 2012|20120621]]
▲[[Category:Astronomical objects discovered in 2005|20050401]]

Retrieved from "https://en.wikipedia.org/wiki/(308242)_2005_GO21"
  




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