90482 Orcus

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90482 Orcus
Orcus nasa.jpg
Discovery[1]
Discovered biM. Brown,
C. Trujillo,
D. Rabinowitz
Discovery date17 Februar 2004
Designations
MPC designation90482 Orcus
Pronunciation/ˈɔːrkəs/ OR-kəs
Named after
Orcus
2004 DW
Plutino[2][3]
possible plutoid
AdjectivesOrcean
Orbital chairactereestics[1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 2
Observation arc23439 days (64.17 yr)
Aphelion48.073 AU (7.1916 Tm)
Perihelion30.866 AU (4.6175 Tm)
39.469 AU (5.9045 Tm)
Eccentricity0.21799
247.97 yr (90571.28 d)
174.67°
0.0039748°/day
Inclination20.564°
268.570°
72.977°
Kent satellitesVanth (276±17 km, assumin equal albedo)
Yird MOID29.9158 AU (4.47534 Tm)
Jupiter MOID26.2355 AU (3.92477 Tm)
Pheesical chairactereestics
Dimensions917±25 km[4]
Mass(6.41±0.19)×1020 kg (system)[5]
Mean density
1.53+0.15
−0.13
 g/cm3
[4]
Equatorial surface gravity
≈ 0.19 m/s2
Equatorial escape velocity
≈ 0.41 km/s
13.188 h[6]
0.231+0.018
−0.011
[4]
Temperatur< 44 K[6]
(neutral)[6]
B−V=0.68; V−R=0.37[7]
19.1 (opposeetion)[8][9]
2.31±0.03 (integral),[4]
primary: 2.41±0.05[10]
Vanth: 4.88±0.05[10] 2.2[1]

90482 Orcus is a Kuiper belt object wi a lairge muin, Vanth. It wis discovered on Februar 17, 2004 bi Michael Brown o Caltech, Chad Trujillo o the Gemini Observatory, an David Rabinowitz o Yale Varsity. Precovery eemages as early as November 8, 1951 war later identified.[1] It is probably a dwarf planet.

References[eedit | eedit soorce]

  1. 1.0 1.1 1.2 1.3 "JPL Small-Body Database Browser: 90482 Orcus (2004 DW)" (2010-02-09 last obs). Retrieved 25 March 2016. 
  2. Buie, Marc W. (2007-12-22). "Orbit Fit and Astrometric record for 90482". SwRI (Space Science Department). Retrieved 2008-09-19. 
  3. "MPEC 2009-E53 :Distant Minor Planets (2009 MAR. 30.0 TT)". Minor Planet Center. 2009-03-11. Retrieved 2011-07-05. 
  4. 4.0 4.1 4.2 4.3 Fornasier, S.; Lellouch, E.; Müller, P., T.; et al. (2013). "TNOs are Cool: A survey of the trans-Neptunian region. VIII. Combined Herschel PACS and SPIRE observations of 9 bright targets at 70–500 µm". Astronomy & Astrophysics. 555: A92. arXiv:1305.0449v2Freely accessible. Bibcode:2013A&A...555A..15F. doi:10.1051/0004-6361/201321329. 
  5. Carry, B.; Hestroffer, D.; Demeo, F. E.; Thirouin, A.; Berthier, J.; Lacerda, P.; Sicardy, B.; Doressoundiram, A.; Dumas, C.; Farrelly, D.; Müller, T. G. (2011). "Integral-field spectroscopy of (90482) Orcus-Vanth". Astronomy & Astrophysics. 534: A115. arXiv:1108.5963Freely accessible. Bibcode:2011A&A...534A.115C. doi:10.1051/0004-6361/201117486. 
  6. 6.0 6.1 6.2 Barucci, M. A.; Merlin; Guilbert; Bergh; Doressoundiram; et al. (2008). "Surface composition and temperature of the TNO Orcus". Astronomy and Astrophysics. 479 (1): L13–L16. Bibcode:2008A&A...479L..13B. doi:10.1051/0004-6361:20079079. 
  7. de Bergh, C.; A. Delsanti; G. P. Tozzi; E. Dotto; A. Doressoundiram; M. A. Barucci (2005). "The Surface of the Transneptunian Object 9048 Orcus". Astronomy & Astrophysics. 437 (3): 1115–1120. Bibcode:2005A&A...437.1115D. doi:10.1051/0004-6361:20042533. 
  8. "AstDys (90482) Orcus Ephemerides". Department of Mathematics, University of Pisa, Italy. Retrieved 2009-03-19. 
  9. "HORIZONS Web-Interface". JPL Solar System Dynamics. Retrieved 2008-07-02. 
  10. 10.0 10.1 Brown, M.E.; Ragozzine, D.; Stansberry, J.; Fraser, W.C. (2010). "The size, density, and formation of the Orcus-Vanth system in the Kuiper belt". The Astronomical Journal. 139 (6): 2700–2705. arXiv:0910.4784Freely accessible. Bibcode:2010AJ....139.2700B. doi:10.1088/0004-6256/139/6/2700.