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{{Infobox Planet |
|bgcolour=#FFFFC0
|name= Sedna
|symbol = [[Berkas:Sedna symbol (bold).svg|24px|⯲]]
|image=[[Berkas:Sedna PRC2004-14d.jpg|frameless|center]]
|caption=
|discovery=yes
|discovery_ref=<ref name=discovery>{{cite web
|title=Discovery Circumstances: Numbered Minor Planets (90001)-(95000)
|publisher=IAU: Minor Planet Center
|url=http://www.cfa.harvard.edu/iau/lists/NumberedMPs090001.html
|accessdate=2008-07-23 }}</ref>
|discoverer=[[Michael E. Brown|M. Brown]],{{br}}[[Chad Trujillo|C. Trujillo]],{{br}}[[David Rabinowitz|D. Rabinowitz]]
|discovered=November 14, 2003
|mp_name=90377 Sedna
|alt_names={{mp|2003 VB|12}}
|mp_category=[[objek trans-Neptunus]]<br />objek terlepas<ref name=DES/>
|orbit_ref =<ref name=DES>{{cite web
|author=[[Marc W. Buie|Buie, Marc W.]]
|date=2007-08-13
|title=Orbit Fit and Astrometric record for 90377
|publisher=[[Deep Ecliptic Survey]]
|url=http://www.boulder.swri.edu/~buie/kbo/astrom/90377.html
|accessdate=2006-01-17}}</ref>
|epoch=26 September 1990 ([[hari Julian]] 2 448 160,5)
|semimajor=7,866 8×10<sup>13</sup> m (525,86 [[satuan astronomi|SA]])
|perihelion=1,139 3{{e|13}} m (76,156 SA)
|aphelion=1,459{{e|14}} m (975.56 SA)
|eccentricity=0,855
|period=sekitar 4.404.480 [[hari]] (12.059,06 [[tahun Julian (astronomi)|tahun]])
|inclination=11,934[[derajat (sudut)|°]]
|asc_node=144,514°
|arg_peri=311,123°
|mean_anomaly=357,457°
|avg_speed=1,04 km/[[detik|det]]
|physical_characteristics=yes
|dimensions=1.200–1.600 km<ref name=largest>{{cite web
|title=The largest Kuiper belt objects
|author=[[Michael E. Brown|Brown, Michael E.]] |work=CalTech
|url=http://www.gps.caltech.edu/~mbrown/papers/ps/kbochap.pdf
|format=PDF|accessdate=2008-09-19}}</ref>
{{br}}<1.600 km<ref name=spitzer>{{cite web
|title=Physical Properties of Kuiper Belt and Centaur Objects: Constraints from Spitzer Space Telescope
|first=John |last=Stansberry |coauthors=Will Grundy, Mike Brown, Dale Cruikshank, John Spencer, David Trilling, Jean-Luc Margot
|work=University of Arizona, Lowell Observatory, California Institute of Technology, NASA Ames Research Center, Southwest Research Institute, Cornell University
|url=http://arxiv.org/abs/astro-ph/0702538v2
|year=2007
|accessdate=2008-07-27}}</ref>
|mass=8,3{{e|20}}–7,0{{e|21}} kg<ref>Radius of 590 km and density of [[Tethys (moon)|0.97]] = 8.3{{e|20}} kg mass. Radius of 900 km and density of [[Eris|2,3]] = 7,0{{e|21}} kg massa</ref>{{br}}(0,05–0,42 Eris)
|density=2,0? g/[[cubic centimetre|cm³]]
|surface_grav=0,33–0,50 m/s²
|escape_velocity=0,62–0,95 km/s
|sidereal_day=0,42 h (10 j) [http://cfa-www.harvard.edu/press/pr0510.html <sup>1</sup>]
|spectral_type= (merah) B-V=1,24; V-R=0,78<ref>{{cite web
|url=http://www.physics.nau.edu/~tegler/research/survey.htm
|title=Kuiper Belt Object Magnitudes and Surface Colors
|accessdate=2006-11-05
|last=Tegler |first=Stephen C.
|date=2006-01-26 }}</ref>
|magnitude = 21,1<ref name=AstDys>{{cite web
|title=AstDys (90377) Sedna Ephemerides
|publisher=Department of Mathematics, University of Pisa, Italy
|url=http://hamilton.dm.unipi.it/astdys/index.php?pc=1.1.3.0&n=Sedna
|accessdate=2009-03-16}}</ref>{{br}}20,4 ([[Apsis|Perihelik]])<ref name=Horizons2076>{{cite web |url=http://home.comcast.net/~kpheider/Sedna2076.txt |title=Horizons Output for Sedna 2076/2114 |accessdate=2007-11-19}} [http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=Sedna Horizons]</ref> <!-- 2076 -->
|abs_magnitude=1,56<ref name=jpldata>{{cite web
|date=2007-11-08 last obs
|title=JPL Small-Body Database Browser: 90377 Sedna (2003 VB12)
|url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=Sedna
|accessdate=2008-06-11}}</ref>
|albedo=0,16–0,30<ref name=largest/>
|single_temperature=dibawah 33 [[kelvin|K]]}}
'''90377 Sedna''' ([[Simbol planet|simbol]]: [[File:Sedna symbol (fixed width).svg|16px|⯲]])<ref>U+2BF2 ⯲. David Faulks (2016) 'Eris and Sedna Symbols,' [https://www.unicode.org/L2/L2016/16173r-eris-sedna.pdf L2/16-173R,] Unicode Technical Committee Document Register.</ref> adalah sebuah [[objek trans-Neptunus]] yang ditemukan oleh [[Michael E. Brown]] ([[California Institute of Technology|Caltech]]), [[Chad Trujillo]] ([[observatorium Gemini]]) dan [[David Rabinowitz]] ([[Universitas Yale]]) pada [[14 November]] [[2003]]. Pada waktu ditemukan, Sedna merupakan benda langit dalam [[Tata Surya]] terjauh yang pernah diamati pada saat itu. Diameter Sedna sekitar 1.180 sampai 1.800 km dengan massa 1,7 - 6,1 x 10<sup>21</sup> kg. [[Perihelion]] Sedna 76,156 [[satuan astronomi|AU]] sedangkan [[aphelion]]-nya 975,056 AU. Sedna membutuhkan 12.000 tahun untuk satu kali mengorbit [[Matahari]].
[[Berkas:Sedna orbit.svg|center|jmpl|kiri|Orbit Sedna]]
== Nama ==
Nama '''Sedna''' diambil dari nama dewi laut bangsa [[Inuit]], yang secara mitologis tinggal di dasar samudra [[Artik]].<ref name=mikebrown>{{cite web|title=Sedna|author=Mike Brown|publisher=CalTech|url=http://www.gps.caltech.edu/~mbrown/sedna/|accessdate=2010-07-20}}</ref>
== Referensi ==
{{reflist}}
{{tata_surya}}
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{{Commonscat|Sedna}}
[[Kategori:Objek trans-Neptunus]]
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