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173117 Promachus (1973 SA1)
Classification: Jupiter Trojan          SPK-ID: 2173117
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 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1209651884797197 1.2632e-07  
a 5.162963900453326 2.5857e-07 AU
q 4.538424999121 6.0996e-07 AU
i 7.779762515553227 1.3529e-05 deg
node 182.1193744999699 6.3513e-05 deg
peri 205.7650019829892 8.022e-05 deg
M 167.2570720888834 5.0686e-05 deg
tp 2455009.693505779129
(2009-Jun-27.19350578)
0.00056333 JED
period 4284.962835763688
11.73
0.0003219
8.813e-07
d
yr
n .08401473100194086 6.3114e-09 deg/d
Q 5.78750280178565 2.8985e-07 AU
  Orbit Determination Parameters
   # obs. used (total)      290  
   data-arc span      14832 days (40.61 yr)  
   first obs. used      1973-09-20  
   last obs. used      2014-04-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .56452  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-11 13:09:36  

Additional Information
 Earth MOID = 3.54482 AU 
 T_jup = 2.967 
[ 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 12.7 mag n/a MPO257779  

173117 Promachus           Discovered 1973 Sept. 24 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Promachus was a Greek warrior in the Iliad who was killed by the Trojan hero Acamas.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20080520/MPCPages.arcLast Updated: 2008-05-22

Alternate Designations
 1973 SA1 = 1996 RN30 = 1997 TL29 = 2002 EA122 = 2005 LX31 = 2007 VC1 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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