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20952 Tydeus (5151 T-2)
Classification: Jupiter Trojan          SPK-ID: 2020952
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 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08398798358039677 8.6649e-08  
a 5.179769907918924 1.4946e-07 AU
q 4.744731477942397 4.6137e-07 AU
i 9.974437415931272 1.0885e-05 deg
node 314.9091889504166 4.5824e-05 deg
peri 90.83826920537217 8.2786e-05 deg
M 133.8733418575819 6.6569e-05 deg
tp 2455399.262570938561
(2010-Jul-21.76257094)
0.00079343 JED
period 4305.90188056526
11.79
0.00018637
5.103e-07
d
yr
n .0836061782143398 3.6187e-09 deg/d
Q 5.614808337895452 1.6201e-07 AU
  Orbit Determination Parameters
   # obs. used (total)      546  
   data-arc span      15135 days (41.44 yr)  
   first obs. used      1973-09-20  
   last obs. used      2015-02-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .60461  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 15:02:52  

Additional Information
 Earth MOID = 3.77271 AU 
 T_jup = 2.963 
[ 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 11.6 mag n/a MPO302193  

20952 Tydeus           Discovered 1973 Sept. 25 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Tydeus was an immortal hero, one of The Seven against Thebes. His son Diomedes was a great hero at Troy.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010309/MPCPages.arcLast Updated: 2009-05-11

Alternate Designations
 5151 T-2 = 1999 XE132 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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