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

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2270108536624747 9.2043e-06  
a 39.17434698624459 0.00047082 au
q 30.28134503522721 0.0007238 au
i 20.5923210465828 2.3416e-05 deg
node 268.7992305654706 0.00016411 deg
peri 72.31084191321693 0.0015048 deg
M 181.7342289310304 0.0023425 deg
tp 2503347.733928676702
(2141-Oct-31.23392868)
1.3238 TDB
period 89557.31724934945
245.19
1.6145
0.00442
d
yr
n .004019772041604061 7.2469e-08 deg/d
Q 48.06734893726196 0.00057771 au
  Orbit Determination Parameters
   # obs. used (total)      1006  
   data-arc span      25036 days (68.54 yr)  
   first obs. used      1951-11-08  
   last obs. used      2020-05-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      2  
   norm. resid. RMS      .36461  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:43:15  

Additional Information
 Earth MOID = 29.3329 au 
 Jupiter MOID = 25.6547 au 
 T_jup = 5.136 
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Orbital Elements at Epoch 2456968.5 (2014-Nov-07.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2185190186126347 9.2063e-06  
q 30.83500516398597 0.00073737 au
tp 2413613.624722374858
(1896-Feb-24.12472237)
0.46038 TDB
node 268.475895049157 0.00016381 deg
peri 73.4229245150612 0.0016026 deg
i 20.55123206425259 2.3014e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      1006  
   data-arc span      25036 days (68.54 yr)  
   first obs. used      1951-11-08  
   last obs. used      2020-05-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      2  
   norm. resid. RMS      .36461  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:43:15  

Additional Information
 Jupiter MOID = 25.6547 au 
 T_jup = 5.136 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.475645320063009E-11 -6.780875855546117E-9 3.097389767261694E-6 5.763401777067821E-12 -1.168272638796528E-8 -7.368792137082005E-12
q -6.780875855546117E-9 5.437208401937155E-7 -.0002401259842816852 -4.037859114228048E-10 9.615059509351377E-7 6.035127099111839E-10
tp 3.097389767261694E-6 -.0002401259842816852 .2119462632278946 1.031030595067957E-6 -.0001263241835120205 -1.3041186452874E-7
node 5.763401777067821E-12 -4.037859114228048E-10 1.031030595067957E-6 2.683403705886665E-8 -2.345238748867162E-8 3.709331628936987E-9
peri -1.168272638796528E-8 9.615059509351377E-7 -.0001263241835120205 -2.345238748867162E-8 2.568181755018436E-6 -2.016593159551081E-9
i -7.368792137082005E-12 6.035127099111839E-10 -1.3041186452874E-7 3.709331628936987E-9 -2.016593159551081E-9 5.296367354556499E-10

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 2.2   n/a MPO220118  
rotation period rot_per 13.188 h n/a LCDB (Rev. 2019-August); 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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