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JPL Small-Body Database Browser
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21284 Pandion (1996 TC51)
Classification: Jupiter Trojan          SPK-ID: 2021284
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1031079484732722 6.6922e-08  
a 5.219753950368124 1.0544e-07 au
q 4.681555829010408 4.0922e-07 au
i 7.037397408186579 5.6939e-06 deg
node 183.9609429840942 4.1385e-05 deg
peri 183.3557771283177 4.868e-05 deg
M 338.1418804122388 2.75e-05 deg
tp 2459264.974479602652
(2021-Feb-19.47447960)
0.00033421 TDB
period 4355.855602064927
11.93
0.00013198
3.613e-07
d
yr
n .08264736779367508 2.5042e-09 deg/d
Q 5.757952071725839 1.1631e-07 au
  Orbit Determination Parameters
   # obs. used (total)      1041  
   data-arc span      8501 days (23.27 yr)  
   first obs. used      1996-09-10  
   last obs. used      2019-12-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45977  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 23:21:51  

Additional Information
 Earth MOID = 3.68042 au 
 Jupiter MOID = .268598 au 
 T_jup = 2.974 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456978.5 (2014-Nov-17.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1003903727537821 6.7054e-08  
q 4.713512206314833 4.1042e-07 au
tp 2454881.975578915421
(2009-Feb-19.47557892)
0.00034781 TDB
node 184.0464853015888 4.1341e-05 deg
peri 182.1479210249496 4.9029e-05 deg
i 7.032227008748432 5.6912e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1041  
   data-arc span      8501 days (23.27 yr)  
   first obs. used      1996-09-10  
   last obs. used      2019-12-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45977  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 23:21:51  

Additional Information
 Jupiter MOID = .268598 au 
 T_jup = 2.974 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.496246091341265E-15 -2.695998190565748E-14 -3.677875078168259E-12 -1.095043682201366E-14 -3.229291866022356E-13 -1.810774143679599E-15
q -2.695998190565748E-14 1.684439520316648E-13 1.089759132413227E-11 7.583255683256429E-14 1.419458847307597E-12 1.339956027075131E-14
tp -3.677875078168259E-12 1.089759132413227E-11 1.209733016115927E-7 -2.382868582751927E-11 9.124766077975192E-9 6.976522766543517E-12
node -1.095043682201366E-14 7.583255683256429E-14 -2.382868582751927E-11 1.709095790535565E-9 -1.697055685434065E-9 -3.782146793912996E-11
peri -3.229291866022356E-13 1.419458847307597E-12 9.124766077975192E-9 -1.697055685434065E-9 2.403814303619265E-9 3.827523687924945E-11
i -1.810774143679599E-15 1.339956027075131E-14 6.976522766543517E-12 -3.782146793912996E-11 3.827523687924945E-11 3.238966690747634E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.5   n/a MPO337438  
diameter diameter 28.550 km 0.415 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
geometric albedo albedo 0.065   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

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 | Mission Design | Physical Parameters | Discovery Circumstances ]
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