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| {{Infobox planet
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| |minorplanet=yes
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| |name=(60621) 2000 FE <sub>8</sub>
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| |image=[[File:Orbit of 2000 FE8.gif|300 px|Orbit of 2000 FE8]]
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| |caption=Orbit of (60621) 2000 FE<sub>8</sub>
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| |bgcolour=#a0ffa0
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| |discovery=yes
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| |discovery_site=[[Mauna Kea Observatory]]
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| |discovered=27 March 2000
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| |orbit_ref=<ref name= "JPL SBDB">{{cite sbdb|title=(60621) 2000 FE 8|id=2060621|orbit=yes}}</ref><ref name= "Johnston archive">
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| {{cite web
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| |last=Johnston |first=W. R. | |
| |date=26 November 2008
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| |title=(60621) 200 FE8
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| |url=http://www.johnstonsarchive.net/astro/astmoons/am-60621.html
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| |work=Johnston's Archive
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| |accessdate=2013-10-01
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| }}</ref><ref name= "MPC">
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| {{cite web
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| |date=4 October 2013
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| |title=List Of Centaurs and Scattered-Disk Objects (by semimajor axis)
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| |url=http://www.minorplanetcenter.net/iau/lists/Centaursa.html
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| |work=Minor Planet Center
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| |accessdate=2013-10-04
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| }}</ref>
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| |aphelion={{convert|77.88399|AU|Gm|4|abbr=on}}
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| |perihelion={{convert|33.00807|AU|Gm|4|abbr=on}}
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| |semimajor={{convert|55.44063|AU|Gm|4|abbr=on}}
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| |eccentricity=0.40468108
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| |period=412.87 years
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| |inclination=5.865358°
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| |asc_node=3.896393°
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| |arg_peri=143.0882°
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| |mean_anomaly=27.58809°
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| |satellites=1
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| |p_mean_motion=0.0024
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| |physical_characteristics=yes
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| |single_temperature=37 K (-236°C)
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| |abs_magnitude=6.9<ref name = "JPL SBDB" />
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| |dimensions={{convert|152|km|mi|abbr=on}}<ref name= "Johnston archive" />
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| |albedo=0.09<ref name = "Johnston archive" />
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| |spectral_type=([[Trans-Neptunian object#Colors|yellow-orange]]) {{nowrap|1=B−V=0.75}}; {{nowrap|1=V−R=0.48}}<ref>
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| {{cite journal
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| |last1=Tegler |first1=S. C.
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| |last2=Romanishin |first2=W.
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| |last3=Consolmango |first3=G. J.
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| |display-authors=1
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| |year=2003
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| |title=Color patterns in the Kuiper belt: a possible primordial origin
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| |journal=[[Astrophysical Journal]]
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| |bibcode=2003ApJ...599L..49T
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| |doi=10.1086/381076
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| }}</ref>
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| }}
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| '''(60621) 2000 FE<sub>8</sub>''' is a [[Scattered-disk object]] that resides in a distant, eccentric orbit that brings it 1.1 to 2.6 times farther than [[Neptune]].<ref name= "JPL SBDB" /> This object is locked in a [[Resonant trans-Neptunian object|2:5 orbital resonance]] with Neptune. It is known to have a single [[Asteroid moon|moon]], S/2007 (60621) 1.<ref name= "TNO List">
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| {{cite web
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| |last=Johnston |first=W. R.
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| |date=5 July 2013
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| |title=List of Known Trans-Neptunian Objects
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| |url=http://www.johnstonsarchive.net/astro/tnoslist.html
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| |work=Johnston's Archive
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| |accessdate=2013-10-05
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| }}</ref>
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| == Orbit ==
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| 2000 FE<sub>8</sub> has an extremely eccentric which crosses the paths of many other [[trans-Neptunian objects]], including almost all of the [[dwarf planets]] and [[dwarf planet candidates]]. As a result, its position alternates between the [[Kuiper Belt]] and the [[Scattered disk]].<ref name= "JPL SBDB" />
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| === Resonance with Neptune ===
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| 2000 FE<sub>8</sub> is part of a group of trans-Neptunian objects that orbit in a 2:5 resonance with Neptune. That means that for every five orbits that Neptune completes, 2000 FE<sub>8</sub> makes only two.<ref name="TNO List" /> Several other objects are in the same orbital resonance, the largest of which is [[(84522) 2002 TC302]].
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| == Moon ==
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| Like many objects of the Kuiper Belt and Scattered Disk, 2000 FE<sub>8</sub> has a moon. This moon, S/2007 (60621) 1, was discovered by the [[Hubble Space Telescope]] seven years after 200 FE<sub>8</sub> itself was found.<ref>{{cite web
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| |last=Green |first=Daniel
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| |date=3 March 2007
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| |title=Circular No. 8816
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| |url=http://www.cbat.eps.harvard.edu/iauc/08800/08816.pdf
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| |work=Harvard
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| |accessdate=2013-10-05
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| }}</ref> The moon orbits at 1180 kilometres away from 2000 FE<sub>8</sub>, completing one orbit every week.<ref name= "Johnston archive" /> It is thought to be 115 km<ref name= "Johnston archive" /> in diameter, just 75.7% the diameter of 2000 FE<sub>8</sub> itself. From the surface of 2000 FE<sub>8</sub>, S/2007 (60621) 1 would have an apparent diameter of roughly 6°,<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> twelve times larger than the [[Sun]] appears from [[Earth]].
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| == Gallery ==
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| <gallery>
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| File:Subaru keck tels.jpg|Telescopes in the Mauna Kea Observatory, where 2000 FE<sub>8</sub> was discovered.
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| File:Hubble 01.jpg|The Hubble space telescope, which discovered S/2007 (60621) 1.
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| </gallery>
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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:Scattered disc and detached objects]]
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| [[Category:Trans-Neptunian objects]]
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| [[Category:Astronomical objects discovered in 2000]]
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| {{Minor planets navigator|(60620) 2000 FD8|60622 Pritchet}}
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