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| {{Infobox planet
| | My name is Hildegard and I am studying Latin American Studies and Educational Studies at Albion Heights / Australia.<br><br>my website ... [http://www.dev.adaptationlearning.net/hostgator-update-mx-records Hostgator Promo Code] |
| |minorplanet=yes
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| |name=1999 OJ<sub>4</sub>
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| |image=[[File:Orbit of 1999 OJ4.gif|thumb|300 px|Orbit of 1999 OJ<sub>4</sub>]]
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| |bgcolour=#FFFFC0
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| |discovery= yes
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| |discoverer= [[Mauna Kea Observatory]]
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| |discovered= July 18, 1999
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| |orbit_ref=<ref name= "Johnston archive" /><ref name= "JPL SBDB">{{cite sbdb|title=(1999 OJ4)|id=3031899|orbit=yes}}</ref><ref name = "Lowell">
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| {{cite web
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| |date=26 March 2013
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| |title=1999 OJ4
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| |url=http://www2.lowell.edu/users/grundy/tnbs/1999_OJ4.html
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| |work=Lowell
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| |accessdate=2013-10-14
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| }}</ref>
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| |aphelion= {{convert|38.9821849|AU|Gm|4|abbr=on}}
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| |perihelion= {{convert|36.9289344|AU|Gm|4|abbr=on}}
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| |semimajor= {{convert|37.9555596|AU|Gm|4|abbr=on}}
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| |eccentricity = .027048087
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| |period= 233.84 years
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| |inclination= 4.00407256°
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| |asc_node= 127.534875°
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| |arg_peri= 296.645795°
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| |mean_anomaly= 275.664317°
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| |satellites= 1
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| |p_mean_motion= 0.0042
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| |physical_characteristics= yes
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| |single_temperature= 43 K (-230°C)
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| |abs_magnitude= 7.1<ref name= "JPL SBDB" />
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| |dimensions= {{convinfobox|75|km||mi}}
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| |albedo= 0.21 (geometric)<ref name= "Johnston archive" /><ref name= "TNO binaries">
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| {{cite journal
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| |last1=Grundy |first1=W. M.
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| |last2=Noll |first2=K. S.
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| |last3=Buie |first3=M. W.
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| |last4=Beneccini |first4=S. D.
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| |last5=Stephens |first5=D. C.
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| |last6=Levison |first6=H. F.
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| |display-authors=1
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| |year=2009
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| |title=Mutual Orbits and Masses of Six Transneptunian Binaries
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| |journal=Icarus
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| |doi=10.1016/j.icarus.2008.12.008
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| |arxiv = 0812.3126 |bibcode = 2009Icar..200..627G }}</ref>
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| }}
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| '''1999 OJ<sub>4</sub>''' is a fairly small [[Classical Kuiper belt object|cubewano]] that orbits in a nearly circular orbit. It is orbited by S/2005 (1999 OJ<sub>4</sub>) 1, a [[asteroid moon|moon]] just 3 kilometres smaller than 1999 OJ<sub>4</sub> itself.<ref name= "Johnston archive">
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| {{cite web
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| |last=Johnston |first=W. R.
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| |date=28 December 2008
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| |title=1999 OJ4
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| |url=http://www.johnstonsarchive.net/astro/astmoons/am-1999oj4.html
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| |work=Johnston's Archive
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| |accessdate=2013-10-14
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| }}</ref>
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| == Orbit and Relationship with the Kuiper Belt ==
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| 1999 OJ<sub>4</sub> orbit characterizes it as a classical Kuiper Belt object, or cubewano. Due to its nearly circular orbit and low inclination, it is also in the "cold" population of cubewanos. As a result, it is likely reddish in color.<ref name="KBOColor">
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| {{cite journal
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| |author=A. Doressoundiram, N. Peixinho, C. de Bergh, S. Fornasier, P. Thebault, M. A. Barucci,C. Veillet
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| |title=The Color Distribution in the Edgeworth-Kuiper Belt
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| |journal=The Astronomical Journal
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| |volume=124|date=October 2002
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| |arxiv=astro-ph/0206468
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| |bibcode = 2002AJ....124.2279D
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| |doi = 10.1086/342447
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| |issue=4
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| |pages=2279
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| }}</ref><ref name="KBOColor2">
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| {{cite journal
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| |author=Nuno Peixinho, Pedro Lacerda and David Jewitt
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| |title=Color-inclination relation of the classical Kuiper belt objects
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| |journal=The Astronomical Journal
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| |volume=136|date=August 2008
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| |arxiv=0808.3025
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| |bibcode = 2008AJ....136.1837P
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| |doi=10.1088/0004-6256/136/5/1837
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| |issue=5
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| |pages=1837
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| }}</ref>
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| == Moon ==
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| 1999 OJ<sub>4</sub> has one moon, S/2005 (1999 OJ<sub>4</sub>) 1. This moon was discovered by the Hubble Space Telescope<ref name= "TNO binaries" /> on October 5, 2013.<ref name= "Johnston archive" /> It orbits 3,267 kilometres away from 1999 OJ<sub>4</sub>, completing one orbit every 84.115 days.<ref name= "Johnston archive" /><ref name= "TNO binaries" /> At 72 km, it is nearly the same size as 1999 OJ<sub>4</sub>. From the surface of 1999 OJ<sub>4</sub>, S/2005 (1999 OJ<sub>4</sub>) 1 would have an apparent diameter of roughly 8.11°,<ref group="lower-alpha">Calculated by solving <math> \scriptstyle{\mathrm{tan}\left(\frac{\theta}{2}\right) = \frac{\mathrm{radius~of~moon}}{\mathrm{distance~from~surface~of~asteroid~to~center~of~moon}}}</math>.</ref> over fourteen times the apparent size of the [[Sun]] from [[Earth]].
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| == Notes ==
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| {{notelist}}
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| == References ==
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| {{Reflist}}
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| [[Category:Classical Kuiper belt objects]]
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| [[Category:Astronomical objects discovered in 1999]]
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My name is Hildegard and I am studying Latin American Studies and Educational Studies at Albion Heights / Australia.
my website ... Hostgator Promo Code