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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2281451991371043 8.5253e-06  
a 39.13747678229834 0.00042754 au
q 30.20844934807709 0.00066316 au
i 20.58903489972608 1.9284e-05 deg
node 268.7672624772132 0.00014035 deg
peri 72.49412193188991 0.0012884 deg
M 182.3057099590447 0.0020171 deg
tp 2503343.173551326334
(2141-Oct-26.67355133)
1.1635 TDB
period 89430.91235410438
244.85
1.4654
0.004012
d
yr
n .004025453733207699 6.5961e-08 deg/d
Q 48.06650421651958 0.00052508 au
  Orbit Determination Parameters
   # obs. used (total)      1143  
   data-arc span      25333 days (69.36 yr)  
   first obs. used      1951-11-08  
   last obs. used      2021-03-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      2  
   norm. resid. RMS      .3795  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 14:40:24  

Additional Information
 Earth MOID = 29.2585 au 
 Jupiter MOID = 25.5839 au 
 T_jup = 5.132 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457262.5 (2015-Aug-28.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2180848991909352 8.5722e-06  
q 30.86020550129049 0.00067897 au
tp 2413502.501676719519
(1895-Nov-05.00167672)
0.45902 TDB
node 268.5385445869523 0.00013981 deg
peri 73.12172887551152 0.0013699 deg
i 20.55976222483786 1.9004e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      1143  
   data-arc span      25333 days (69.36 yr)  
   first obs. used      1951-11-08  
   last obs. used      2021-03-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      2  
   norm. resid. RMS      .3795  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 14:40:24  

Additional Information
 Jupiter MOID = 25.5839 au 
 T_jup = 5.132 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.348188454071934E-11 -5.815757809476312E-9 3.00257314204564E-6 -3.487097167566524E-12 -8.935110912705455E-9 -7.410657592140768E-12
q -5.815757809476312E-9 4.610065967682986E-7 -.0002325070426023618 3.202353424266702E-10 7.245825105579897E-7 5.96195789593061E-10
tp 3.00257314204564E-6 -.0002325070426023618 .2107038503534303 6.219395815290219E-7 -.0001064542000978393 -1.839321118407012E-7
node -3.487097167566524E-12 3.202353424266702E-10 6.219395815290219E-7 1.95467213184466E-8 -1.562677928935948E-8 2.603066162002901E-9
peri -8.935110912705455E-9 7.245825105579897E-7 -.0001064542000978393 -1.562677928935948E-8 1.876678300422873E-6 -1.170207897586935E-9
i -7.410657592140768E-12 5.96195789593061E-10 -1.839321118407012E-7 2.603066162002901E-9 -1.170207897586935E-9 3.611623262400417E-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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