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

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01779078225397332 7.7471e-08  
a 5.139284551601569 1.6182e-07 AU
q 5.047852659202817 4.0653e-07 AU
i 9.208641216145779 9.2401e-06 deg
node 27.90591121313594 5.0151e-05 deg
peri 51.75785203223008 0.00032008 deg
M 107.7145159571114 0.00030978 deg
tp 2455727.219298345622
(2011-Jun-14.71929835)
0.0036772 JED
period 4255.517917177378
11.65
0.00020098
5.503e-07
d
yr
n .08459604847317449 3.9954e-09 deg/d
Q 5.230716444000321 1.647e-07 AU
  Orbit Determination Parameters
   # obs. used (total)      573  
   data-arc span      15166 days (41.52 yr)  
   first obs. used      1973-09-19  
   last obs. used      2015-03-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .59616  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 17:07:52  

Additional Information
 Earth MOID = 4.06963 AU 
 T_jup = 2.974 
[ 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 11.9 mag 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 | Physical Parameters | Discovery Circumstances ]
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