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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .228145384649672 8.5761e-06  
a 39.13746437103155 0.00043063 au
q 30.20843250788972 0.00066746 au
i 20.58903309922108 2.0827e-05 deg
node 268.7672513746157 0.00014933 deg
peri 72.49406725176109 0.0013136 deg
M 182.3058126435936 0.002052 deg
tp 2503343.127044756227
(2141-Oct-26.62704476)
1.1762 TDB
period 89430.86981364511
244.85
1.476
0.004041
d
yr
n .004025455648034771 6.6438e-08 deg/d
Q 48.06649623417338 0.00052888 au
  Orbit Determination Parameters
   # obs. used (total)      1066  
   data-arc span      25272 days (69.19 yr)  
   first obs. used      1951-11-08  
   last obs. used      2021-01-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      2  
   norm. resid. RMS      .37487  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 07:54:55  

Additional Information
 Earth MOID = 29.2585 au 
 Jupiter MOID = 25.5839 au 
 T_jup = 5.132 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457137.5 (2015-Apr-25.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2180748707338226 8.6158e-06  
q 30.8620289713528 0.00068322 au
tp 2413540.288829506331
(1895-Dec-12.78882951)
0.46125 TDB
node 268.5090829125146 0.0001488 deg
peri 73.25627211763779 0.0014001 deg
i 20.55578593137361 2.05e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      1066  
   data-arc span      25272 days (69.19 yr)  
   first obs. used      1951-11-08  
   last obs. used      2021-01-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      2  
   norm. resid. RMS      .37487  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 07:54:55  

Additional Information
 Jupiter MOID = 25.5839 au 
 T_jup = 5.132 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.42317705098041E-11 -5.881111327732983E-9 3.010767276884132E-6 2.126597751336502E-11 -9.140704712141619E-9 -3.692413584011632E-12
q -5.881111327732983E-9 4.667901824977854E-7 -.0002327185460385429 -1.654437277413788E-9 7.441323707076647E-7 3.006926555675883E-10
tp 3.010767276884132E-6 -.0002327185460385429 .2127503847519968 1.513530661458765E-6 -.0001013875279454048 -4.53291138495524E-8
node 2.126597751336502E-11 -1.654437277413788E-9 1.513530661458765E-6 2.214020223104741E-8 -2.146770353697458E-8 2.993916072106642E-9
peri -9.140704712141619E-9 7.441323707076647E-7 -.0001013875279454048 -2.146770353697458E-8 1.96033904978371E-6 -2.030455237806707E-9
i -3.692413584011632E-12 3.006926555675883E-10 -4.53291138495524E-8 2.993916072106642E-9 -2.030455237806707E-9 4.202377540114171E-10

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 2.30   n/a E2021B10  
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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