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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08395253683110611 8.4281e-08  
a 5.178272661604067 1.3888e-07 au
q 4.743543535259242 4.5669e-07 au
i 9.973716203587822 8.95e-06 deg
node 314.8896190197635 4.5407e-05 deg
peri 90.21787645896688 7.2241e-05 deg
M 184.8003025365984 5.804e-05 deg
tp 2459695.126770037371
(2022-Apr-25.62677004)
0.00072862 JED
period 4304.035041903964
11.78
0.00017315
4.741e-07
d
yr
n .08364244168438456 3.365e-09 deg/d
Q 5.613001787948892 1.5054e-07 au
  Orbit Determination Parameters
   # obs. used (total)      618  
   data-arc span      15544 days (42.56 yr)  
   first obs. used      1973-09-20  
   last obs. used      2016-04-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5818  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:35:49  

Additional Information
 Earth MOID = 3.77019 au 
 Jupiter MOID = .0847228 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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