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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04751878421210653 5.0239e-08  
a 5.189577769368773 8.5375e-08 au
q 4.942975343194193 2.8902e-07 au
i 13.11365674329951 5.1067e-06 deg
node 323.1153900552321 2.0378e-05 deg
peri 56.81355882388101 5.4165e-05 deg
M .6118237919058743 4.7947e-05 deg
tp 2458993.161279895271
(2020-May-23.66127990)
0.00057519 TDB
period 4318.137464828665
11.82
0.00010656
2.917e-07
d
yr
n .08336927736372657 2.0573e-09 deg/d
Q 5.436180195543353 8.9432e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1756  
   data-arc span      23959 days (65.60 yr)  
   first obs. used      1955-03-24  
   last obs. used      2020-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41557  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:23:09  

Additional Information
 Earth MOID = 3.96312 au 
 Jupiter MOID = .0103118 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 10.8   n/a MPO337324  
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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