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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .218390907572187 2.2124e-05  
a 39.45453641868836 0.001251 au
q 30.8380244023711 0.001849 au
i 20.57067710563737 6.3194e-05 deg
node 268.6219632662439 0.00031072 deg
peri 72.75450485197582 0.004355 deg
M 175.7295826560658 0.0064716 deg
tp 2413414.344045607810
(1895-Aug-08.84404561)
0.63979 JED
period 90519.85387522407
247.83
4.3053
0.01179
d
yr
n .003977028072716924 1.8916e-07 deg/d
Q 48.07104843500562 0.0015242 au
  Orbit Determination Parameters
   # obs. used (total)      443  
   data-arc span      23519 days (64.39 yr)  
   first obs. used      1951-11-08  
   last obs. used      2016-03-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      2  
   fit RMS      .36902  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 15:37:29  

Additional Information
 Earth MOID = 29.889 au 
 Jupiter MOID = 26.207 au 
 T_jup = 5.164 
[ 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. 2016-February); 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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