90377 Sedna

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90377 Sedna
Sedna-NASA.JPG
Sedna, ditengeri bunderan ijo
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 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 samudra Artik.[10]

Rujukan[besut | besut sumber]

  1. "Discovery Circumstances: Numbered Minor Planets (90001)-(95000)". IAU: Minor Planet Center. Retrieved 2008-07-23.
  2. a b Buie, Marc W. (2007-08-13). "Orbit Fit and Astrometric record for 90377". Deep Ecliptic Survey. Retrieved 2006-01-17.
  3. a b Brown, Michael E. "The largest Kuiper belt objects" (PDF). CalTech. Retrieved 2008-09-19.
  4. 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. Retrieved 2008-07-27. Unknown parameter |coauthors= ignored (|author= suggested) (help)
  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". Retrieved 2006-11-05.
  7. "AstDys (90377) Sedna Ephemerides". Department of Mathematics, University of Pisa, Italy. Retrieved 2009-03-16.
  8. "Horizons Output for Sedna 2076/2114". Archived from the original on 2012-07-04. Retrieved 2007-11-19. Horizons
  9. "JPL Small-Body Database Browser: 90377 Sedna (2003 VB12)". 2007-11-08 last obs. Retrieved 2008-06-11. Check date values in: |date= (help)
  10. Mike Brown. "Sedna". CalTech. Retrieved 2010-07-20.