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90482 Orcus (2004 DW)
Classification: TransNeptunian Object          SPK-ID: 2090482
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2179877005531899 2.2795e-05  
a 39.46933630915997 0.0013055 au
q 30.86550644476566 0.0019185 au
i 20.56393080776849 6.9009e-05 deg
node 268.5700981278675 0.00033717 deg
peri 72.97678751294768 0.0046224 deg
M 174.6740773494891 0.0068242 deg
tp 2413455.029407522226
(1895-Sep-18.52940752)
0.63898 JED
period 90570.79134666614
247.97
4.4938
0.0123
d
yr
n .003974791372000653 1.9721e-07 deg/d
Q 48.07316617355428 0.0015901 au
  Orbit Determination Parameters
   # obs. used (total)      440  
   data-arc span      23135 days (63.34 yr)  
   first obs. used      1951-11-08  
   last obs. used      2015-03-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      2  
   fit RMS      .36775  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 19:06:56  

Additional Information
 Earth MOID = 29.9156 au 
 Jupiter MOID = 26.2353 au 
 T_jup = 5.165 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 2.2 mag n/a MPO220118  
rotation period rot_per 13.188 h n/a LCDB (Rev. 2015-December); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Rabinowitz, D.L.; Schaefer, B.E.; Tourtellotte, S.W. (2007) Astron. J. 133, 26-43.]

90482 Orcus I           Discovered 2005 Nov. 13 by T.-A. Suer and M. E. Brown at Palomar.
Vanth is a daimon in Etruscan mythology who guides the dead to the underworld. She often appears on tomb paintings and sarcophagi, where she is depicted with wings and a torch. She is frequently shown in the presence of Charun, a guard of the underworld. The name was suggested by S. Taaffe.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20100330/MPCPages.arcLast Updated: 2010-04-05
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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