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JPL Small-Body Database Browser
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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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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet 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. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet is not working, here are some notes that might help.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .224158085602422 1.4245e-05  
a 39.26601097032284 0.00075278 au
q 30.46421712197157 0.0011423 au
i 20.59306332741462 3.5698e-05 deg
node 268.8063226400557 0.00023109 deg
peri 72.15880866202518 0.0024185 deg
M 180.3477859864679 0.0037202 deg
tp 2503449.594102730691
2.1728 TDB
period 89871.83356263503
n .004005704409592385 1.1519e-07 deg/d
Q 48.06780481867411 0.00092153 au
  Orbit Determination Parameters
   # obs. used (total)      709  
   data-arc span      24866 days (68.08 yr)  
   first obs. used      1951-11-08  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      2  
   norm. resid. RMS      .36345  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 08:14:39  

Additional Information
 Earth MOID = 29.5148 au 
 Jupiter MOID = 25.8345 au 
 T_jup = 5.145 
[ 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   n/a MPO220118  
rotation period rot_per 13.188 h n/a LCDB (Rev. 2019-January); 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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