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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0844851606570982 4.5402e-08  
a 5.185595082699984 9.3875e-08 au
q 4.747489249035417 2.4756e-07 au
i 3.213136937272404 5.233e-06 deg
node 97.09710628172753 9.741e-05 deg
peri 19.98804249291734 0.00010465 deg
M 247.5050588720089 4.1099e-05 deg
tp 2460348.304250532223
(2024-Feb-07.80425053)
0.00051485 TDB
period 4313.167555148575
11.81
0.00011712
3.207e-07
d
yr
n .08346534081901651 2.2665e-09 deg/d
Q 5.623700916364551 1.0181e-07 au
  Orbit Determination Parameters
   # obs. used (total)      868  
   data-arc span      16816 days (46.04 yr)  
   first obs. used      1973-09-19  
   last obs. used      2019-10-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60434  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 03:19:50  

Additional Information
 Earth MOID = 3.76399 au 
 Jupiter MOID = .104769 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 11.9   n/a MPO452308  
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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