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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}}
{{CentaurTNO-stub}}
{{Commonscat|Sedna}}
[[Kategori:Objek trans-Neptunus]]
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Revisi terkini sejak 22 Mei 2024 07.23
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Penemuan[1] | |
---|---|
Ditemukan oleh | M. Brown, C. Trujillo, D. Rabinowitz |
Tanggal penemuan | November 14, 2003 |
Penamaan | |
Penamaan | 90377 Sedna |
2003 VB12 | |
objek trans-Neptunus objek terlepas[2] | |
Ciri-ciri orbit[2] | |
Epos 26 September 1990 (hari Julian 2 448 160,5) | |
Aphelion | 1,459×1014 m (975.56 SA) |
Perihelion | 1,139 3×1013 m (76,156 SA) |
7,866 8×1013 m (525,86 SA) | |
Eksentrisitas | 0,855 |
sekitar 4.404.480 hari (12.059,06 tahun) | |
Kecepatan orbit rata-rata | 1,04 km/det |
357,457° | |
Inklinasi | 11,934° |
144,514° | |
311,123° | |
Ciri-ciri fisik | |
Dimensi | 1.200–1.600 km[3]
<1.600 km[4] |
Massa | 8,3×1020–7,0×1021 kg[5] (0,05–0,42 Eris) |
Massa jenis rata-rata | 2,0? g/cm³ |
0,33–0,50 m/s² | |
0,62–0,95 km/s | |
Periode rotasi sideris | 0,42 h (10 j) 1 |
Albedo | 0,16–0,30[3] |
Suhu | dibawah 33 K |
Pola spektrum | (merah) B-V=1,24; V-R=0,78[6] |
21,1[7] 20,4 (Perihelik)[8] | |
1,56[9] | |
90377 Sedna (simbol: )[10] adalah sebuah objek trans-Neptunus yang ditemukan oleh Michael E. Brown (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 1021 kg. Perihelion Sedna 76,156 AU sedangkan aphelion-nya 975,056 AU. Sedna membutuhkan 12.000 tahun untuk satu kali mengorbit Matahari.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/e/e3/Sedna_orbit.svg/220px-Sedna_orbit.svg.png)
Nama
[sunting | sunting sumber]Nama Sedna diambil dari nama dewi laut bangsa Inuit, yang secara mitologis tinggal di dasar samudra Artik.[11]
Referensi
[sunting | sunting sumber]- ^ "Discovery Circumstances: Numbered Minor Planets (90001)-(95000)". IAU: Minor Planet Center. Diakses tanggal 2008-07-23.
- ^ a b Buie, Marc W. (2007-08-13). "Orbit Fit and Astrometric record for 90377". Deep Ecliptic Survey. Diakses tanggal 2006-01-17.
- ^ a b Brown, Michael E. "The largest Kuiper belt objects" (PDF). CalTech. Diakses tanggal 2008-09-19.
- ^ Stansberry, John (2007). "Physical Properties of Kuiper Belt and Centaur Objects: Constraints from Spitzer Space Telescope". University of Arizona, Lowell Observatory, California Institute of Technology, NASA Ames Research Center, Southwest Research Institute, Cornell University. Diakses tanggal 2008-07-27.
- ^ Radius of 590 km and density of 0.97 = 8.3×1020 kg mass. Radius of 900 km and density of 2,3 = 7,0×1021 kg massa
- ^ Tegler, Stephen C. (2006-01-26). "Kuiper Belt Object Magnitudes and Surface Colors". Diakses tanggal 2006-11-05.
- ^ "AstDys (90377) Sedna Ephemerides". Department of Mathematics, University of Pisa, Italy. Diakses tanggal 2009-03-16.
- ^ "Horizons Output for Sedna 2076/2114". Diakses tanggal 2007-11-19. Horizons
- ^ "JPL Small-Body Database Browser: 90377 Sedna (2003 VB12)". 2007-11-08 last obs. Diakses tanggal 2008-06-11.
- ^ U+2BF2 ⯲. David Faulks (2016) 'Eris and Sedna Symbols,' L2/16-173R, Unicode Technical Committee Document Register.
- ^ Mike Brown. "Sedna". CalTech. Diakses tanggal 2010-07-20.
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