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9828 Antimachos (1973 SS)
Classification: Jupiter Trojan          SPK-ID: 2009828
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08467812910538698 3.6654e-08  
a 5.186533387791839 8.3079e-08 au
q 4.747347443971002 2.2691e-07 au
i 3.213134548726749 3.9036e-06 deg
node 97.09876968361915 9.5695e-05 deg
peri 19.8251065137123 0.00010285 deg
M 264.3881828309644 4.0785e-05 deg
tp 2460346.338117452942
(2024-Feb-05.83811745)
0.00050694 TDB
period 4314.338274250999
11.81
0.00010366
2.838e-07
d
yr
n .08344269204586156 2.0049e-09 deg/d
Q 5.625719331612677 9.0114e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1088  
   data-arc span      17310 days (47.39 yr)  
   first obs. used      1973-09-19  
   last obs. used      2021-02-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56226  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 21:38:36  

Additional Information
 Earth MOID = 3.76376 au 
 Jupiter MOID = .105176 au 
 T_jup = 2.990 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.96   n/a MPCxxxxx  
diameter diameter 20.272 km 0.616 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  
geometric albedo albedo 0.082   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  

9828 Antimachos           Discovered 1973 Sept. 19 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Antimachos was one of the heroes hidden in the Wooden Horse.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990402/MPCPages.arcLast Updated: 2010-06-11

Alternate Designations
 1973 SS = 1996 RO33 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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