Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08387545556294886 8.5755e-08  
a 5.17874477263302 1.4062e-07 au
q 4.744375195584185 4.6122e-07 au
i 9.973775674610101 9.3707e-06 deg
node 314.8993639517582 4.5585e-05 deg
peri 90.42135314952085 7.4217e-05 deg
M 167.8222467199703 5.9443e-05 deg
tp 2455393.801070856751
(2010-Jul-16.30107086)
0.00069038 JED
period 4304.62366349434
11.79
0.00017533
4.8e-07
d
yr
n .08363100427407977 3.4063e-09 deg/d
Q 5.613114349681855 1.5242e-07 au
  Orbit Determination Parameters
   # obs. used (total)      605  
   data-arc span      15216 days (41.66 yr)  
   first obs. used      1973-09-20  
   last obs. used      2015-05-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .58299  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 16:38:19  

Additional Information
 Earth MOID = 3.77136 au 
 Jupiter MOID = .0857267 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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2016-Feb-10 12:53 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin