Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


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

[ hide orbit diagram ]

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.


[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08542947063540794 6.2213e-08  
a 5.173195054710511 1.1864e-07 au
q 4.731251739692881 3.9371e-07 au
i 9.983704400852913 6.7173e-06 deg
node 314.8252130310723 3.4108e-05 deg
peri 90.22883808468201 5.7569e-05 deg
M 268.7019256040594 5.0842e-05 deg
tp 2459690.423017886828
(2022-Apr-20.92301789)
0.00062788 TDB
period 4297.706047310722
11.77
0.00014784
4.048e-07
d
yr
n .08376561729373488 2.8816e-09 deg/d
Q 5.61513836972814 1.2877e-07 au
  Orbit Determination Parameters
   # obs. used (total)      788  
   data-arc span      16836 days (46.09 yr)  
   first obs. used      1973-09-20  
   last obs. used      2019-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57607  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 04:25:56  

Additional Information
 Earth MOID = 3.75894 au 
 Jupiter MOID = .0838262 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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jan-22 05:32 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin