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20961 Arkesilaos (1973 SS1)
Classification: Jupiter Trojan          SPK-ID: 2020961
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01803135276629408 5.1945e-08  
a 5.140228531554684 1.0043e-07 au
q 5.047543257602852 3.3771e-07 au
i 9.205295119112808 6.4549e-06 deg
node 27.8787514943252 3.1567e-05 deg
peri 46.88663035734368 0.00019516 deg
M 282.0504273276744 0.000194 deg
tp 2459922.186670297265
(2022-Dec-08.68667030)
0.0023007 TDB
period 4256.690446550928
11.65
0.00012475
3.415e-07
d
yr
n .08457274601485235 2.4785e-09 deg/d
Q 5.232913805506517 1.0224e-07 au
  Orbit Determination Parameters
   # obs. used (total)      959  
   data-arc span      17201 days (47.09 yr)  
   first obs. used      1973-09-19  
   last obs. used      2020-10-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54452  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:59:42  

Additional Information
 Earth MOID = 4.06764 au 
 Jupiter MOID = .128246 au 
 T_jup = 2.974 
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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 MPO279732  

20961 Arkesilaos           Discovered 1973 Sept. 19 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Arkesilaos, who was from Boeotia, was one of the first heroes to join the Greek army.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010705/MPCPages.arcLast Updated: 2009-05-11

Alternate Designations
 1973 SS1 = 1996 RQ28 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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