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8125 Tyndareus (5493 T-2)
Classification: Jupiter Trojan          SPK-ID: 2008125
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04788908886425373 2.4397e-08  
a 5.191724256543485 8.1116e-08 au
q 4.943097312263173 1.7051e-07 au
i 13.11328862070827 3.8892e-07 deg
node 323.1119886795076 4.7723e-06 deg
peri 57.02410090306881 2.5888e-05 deg
M 17.08560930273496 2.5637e-05 deg
tp 2458995.433922475426
(2020-May-25.93392248)
0.0003096 TDB
period 4320.816811433789
11.83
0.00010126
2.772e-07
d
yr
n .08331757991853864 1.9526e-09 deg/d
Q 5.440351200823798 8.5001e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1909  
   data-arc span      24103 days (65.99 yr)  
   first obs. used      1955-03-24  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4149  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 23:47:26  

Additional Information
 Earth MOID = 3.96198 au 
 Jupiter MOID = .0125084 au 
 T_jup = 2.946 
[ 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 10.89   n/a MPCxxxxx  
diameter diameter 27.088 km 0.383 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
geometric albedo albedo 0.126   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

8125 Tyndareus           Discovered 1973 Sept. 30 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Named for a king of Sparta, father of Clytemnestra and Helena. Often it is said, however, that Tyndareus was the foster-father of Helena, because Helena is generally considered to have been the daughter of Zeus and Leda.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19980411/MPCPages.arcLast Updated: 2009-11-17

Alternate Designations
 5493 T-2 = 1989 CT6 = 1989 ED12 = 1990 EE1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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