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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2289632641636309 8.36e-06  
a 39.11048544494336 0.00042091 au
q 30.15562103444494 0.00065101 au
i 20.58490129117861 1.8588e-05 deg
node 268.7255500519894 0.00013658 deg
peri 72.70167878758274 0.0012835 deg
M 182.8378329941491 0.0020213 deg
tp 2503361.463779570571
(2141-Nov-13.96377957)
1.1524 TDB
period 89338.41365872823
244.60
1.4422
0.003949
d
yr
n .004029621584452978 6.505e-08 deg/d
Q 48.06534985544177 0.00051728 au
  Orbit Determination Parameters
   # obs. used (total)      1219  
   data-arc span      25418 days (69.59 yr)  
   first obs. used      1951-11-08  
   last obs. used      2021-06-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      2  
   norm. resid. RMS      .38965  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 23:38:18  

Additional Information
 Earth MOID = 29.2068 au 
 Jupiter MOID = 25.5329 au 
 T_jup = 5.130 
[ 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 2.29   n/a MPCxxxxx  
rotation period rot_per 13.188 h n/a LCDB (Rev. 2020-October); 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           Discovered 2004 Feb. 17 by M. Brown, C. Trujillo and D. Rabinowitz
Orcus was the Roman god of death, the counterpart of the Greek Pluto. Orcus collected the dead and carried them back to the underworld that he ruled.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20041126/MPCPages.arcLast Updated: 2016-05-31
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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