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21284 Pandion (1996 TC51)
Classification: Jupiter Trojan          SPK-ID: 2021284
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.

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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1015058586081353 9.5512e-08  
a 5.235551113079657 1.5542e-07 au
q 4.704112002059728 4.9043e-07 au
i 7.034795541629795 9.7064e-06 deg
node 184.0517956884405 5.2907e-05 deg
peri 181.6859077144302 6.3763e-05 deg
M 224.0343030175431 4.2191e-05 deg
tp 2459253.104325527328
0.00055156 JED
period 4375.644522063534
n .08227359379509779 3.6635e-09 deg/d
Q 5.766990224099587 1.712e-07 au
  Orbit Determination Parameters
   # obs. used (total)      701  
   data-arc span      7157 days (19.59 yr)  
   first obs. used      1996-09-10  
   last obs. used      2016-04-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .56296  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:36:30  

Additional Information
 Earth MOID = 3.70135 au 
 Jupiter MOID = .24525 au 
 T_jup = 2.975 
[ 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 11.5 mag n/a MPO337438  

21284 Pandion           Discovered 1996 Oct. 5 by E. W. Elst at the European Southern Observatory.
Pandion was a Greek fighter who helped Menestheus, the leader of the Athenian soldiers, to escape from the attack by Sarpedon.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20100527/MPCPages.arcLast Updated: 2010-12-06

Alternate Designations
 1996 TC51 = 2000 AN108 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
FirstGov 2016-May-03 03:03 UT
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