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90377 Sedna

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(Kaelih saka Sedna)
90377 Sedna ⯲
Panemon[1]
Panemu M. Brown,
C. Trujillo,
D. Rabinowitz
Tanggal ditemokaké 14 November 2003
Penamaan
Penamaan MPC 90377 Sedna
Nama alternatif2003 VB12
Kategori
planet minor		 objèk trans-Neptunus
objèk kauwal[2]
Epos 26 September 1990 (dina Julian 2 448 160,5)
Aphelion1,459×1014 m (975.56 SA)
Perihelion 1,139 3×1013 m (76,156 SA)
Sumbu semi-mayor 7,866 8×1013 m (525,86 SA)
Eksentrisitas 0,855
Periode orbit sakiwa-tengené 4.404.480 dina (12.059,06 taun)
Kecepatan orbit rata-rata 1,04 km/det
Anomali rata-rata 357,457°
Inklinasi 11,934°
Bujur node menaik 144,514°
Argumen perihelion 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)
Kepadatan rata-rata 2,0? g/cm³
Gravitasi permukaan di khatulistiwa0,33–0,50 m/s²
Kecepatan lepas0,62–0,95 km/s
Hari sideris 0,42 h (10 j) 1
Albedo0,16–0,30[3]
Suhu sangisoré 33 K
Kelas spektrum(merah) B-V=1,24; V-R=0,78 [6]
Magnitudo tampak 21,1[7]
20,4 (Perihelik)[8]
Magnitudo mutlak (H) 1,56[9]

90377 Sedna (simbol: ⯲)[10] iku sawijining objèk trans-Neptunus sing tinemu déning Michael E. Brown (Caltech), Chad Trujillo (observatorium Gemini) lan David Rabinowitz (Universitas Yale) nalika tanggal 14 November 2003. Nalika tinemu, Sedna wujud bendha langit sajeroning Tata Surya paling adoh sing tau diamati ing wektu iku. Dhiamèter Sedna watara 1.180 nganti 1.800 km kanthi massa 1,7-6,1 x 1021 kg. Perihelion Sedna 76,156 AU éwadéné aphelion-é 975,056 AU. Sedna mbutuhaké 12.000 taun kanggo saubengan ngorbit Srengéngé.

Jeneng

[besut | besut sumber]

Jeneng Sedna dijupuk saka jeneng déwi laut bangsa Inuit, sing kanthi mitologis manggon ing dhasar samodra Artik.[11]

Rujukan

[besut | besut sumber]
  1. ↑ "Discovery Circumstances: Numbered Minor Planets (90001)-(95000)". IAU: Minor Planet Center. Dibukak ing 2008-07-23.
  2. ↑ a b Buie, Marc W. (2007-08-13). "Orbit Fit and Astrometric record for 90377". Deep Ecliptic Survey. Dibukak ing 2006-01-17.
  3. ↑ a b Brown, Michael E. "The largest Kuiper belt objects" (PDF). CalTech. Dibukak ing 2008-09-19.
  4. ↑ Stansberry, John; Will Grundy; Mike Brown; Dale Cruikshank; John Spencer; David Trilling; Jean-Luc Margot (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. Dibukak ing 2008-07-27.
  5. ↑ 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
  6. ↑ Tegler, Stephen C. (2006-01-26). "Kuiper Belt Object Magnitudes and Surface Colors". Dibukak ing 2006-11-05.
  7. ↑ "AstDys (90377) Sedna Ephemerides". Department of Mathematics, University of Pisa, Italy. Dibukak ing 2009-03-16.
  8. ↑ "Horizons Output for Sedna 2076/2114". Diarsip saka sing asli ing 2011-06-29. Dibukak ing 2007-11-19. Horizons
  9. ↑ "JPL Small-Body Database Browser: 90377 Sedna (2003 VB12)". 2007-11-08. Dibukak ing 2008-06-11.
  10. ↑ U+2BF2 ⯲. David Faulks (2016) 'Eris and Sedna Symbols,' L2/16-173R, Unicode Technical Committee Document Register.
  11. ↑ Mike Brown. "Sedna". CalTech. Dibukak ing 2010-07-20.


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