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JPL Small-Body Database Browser
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20952 Tydeus (5151 T-2)
Classification: Jupiter Trojan          SPK-ID: 2020952
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08542947141186993 6.2983e-08  
a 5.173195050604868 1.1905e-07 au
q 4.731251731921192 3.9595e-07 au
i 9.983704372385262 6.7343e-06 deg
node 314.8252118834073 3.4946e-05 deg
peri 90.22883410691878 5.8052e-05 deg
M 268.7019308593278 5.0951e-05 deg
tp 2459690.422953851548
(2022-Apr-20.92295385)
0.00062933 TDB
period 4297.706042194489
11.77
0.00014835
4.062e-07
d
yr
n .08376561739345423 2.8915e-09 deg/d
Q 5.615138369288544 1.2922e-07 au
  Orbit Determination Parameters
   # obs. used (total)      769  
   data-arc span      16784 days (45.95 yr)  
   first obs. used      1973-09-20  
   last obs. used      2019-09-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57004  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 01:30:53  

Additional Information
 Earth MOID = 3.75894 au 
 Jupiter MOID = .0838261 au 
 T_jup = 2.963 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.6   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 | Mission Design | Physical Parameters | Discovery Circumstances ]
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