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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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08398798794519097 8.7038e-08  
a 5.179769922956588 1.521e-07 AU
q 4.744731469108447 4.6167e-07 AU
i 9.974435103784774 1.1185e-05 deg
node 314.9091915711614 4.5921e-05 deg
peri 90.83825430869376 8.5573e-05 deg
M 133.8733523457082 6.9016e-05 deg
tp 2455399.262438518821
(2010-Jul-21.76243852)
0.00082636 JED
period 4305.901899316296
11.79
0.00018966
5.193e-07
d
yr
n .08360617785025753 3.6825e-09 deg/d
Q 5.614808376804729 1.6487e-07 AU
  Orbit Determination Parameters
   # obs. used (total)      542  
   data-arc span      14806 days (40.54 yr)  
   first obs. used      1973-09-20  
   last obs. used      2014-04-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .60587  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Aug-13 14:35:18  

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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