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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
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 2-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 has stopped working because of a recent Java upgrade, here is a possible workaround.
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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2179877005531899 2.2795e-05  
a 39.46933630915997 0.0013055 au
q 30.86550644476566 0.0019185 au
i 20.56393080776849 6.9009e-05 deg
node 268.5700981278675 0.00033717 deg
peri 72.97678751294768 0.0046224 deg
M 174.6740773494891 0.0068242 deg
tp 2413455.029407522226
0.63898 JED
period 90570.79134666614
n .003974791372000653 1.9721e-07 deg/d
Q 48.07316617355428 0.0015901 au
  Orbit Determination Parameters
   # obs. used (total)      440  
   data-arc span      23135 days (63.34 yr)  
   first obs. used      1951-11-08  
   last obs. used      2015-03-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      2  
   fit RMS      .36775  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 19:06:56  

Additional Information
 Earth MOID = 29.9156 au 
 Jupiter MOID = 26.2353 au 
 T_jup = 5.165 
[ 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 mag n/a MPO220118  
rotation period rot_per 13.188 h n/a LCDB (Rev. 2015-December); 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 I           Discovered 2005 Nov. 13 by T.-A. Suer and M. E. Brown at Palomar.
Vanth is a daimon in Etruscan mythology who guides the dead to the underworld. She often appears on tomb paintings and sarcophagi, where she is depicted with wings and a torch. She is frequently shown in the presence of Charun, a guard of the underworld. The name was suggested by S. Taaffe.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20100330/MPCPages.arcLast Updated: 2010-04-05
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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