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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04751878632992373 5.7463e-08  
a 5.189577766468624 9.2699e-08 au
q 4.942975329441279 3.4004e-07 au
i 13.11365637392091 5.7992e-06 deg
node 323.1153901186883 2.0389e-05 deg
peri 56.81355750838381 5.6273e-05 deg
M .6118253326476756 5.1359e-05 deg
tp 2458993.161261420493
(2020-May-23.66126142)
0.00061608 TDB
period 4318.137461208937
11.82
0.0001157
3.168e-07
d
yr
n .08336927743361182 2.2338e-09 deg/d
Q 5.436180203495971 9.7104e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1517  
   data-arc span      23685 days (64.85 yr)  
   first obs. used      1955-03-24  
   last obs. used      2020-01-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43804  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 18:46:43  

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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