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JPL Small-Body Database Browser
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20738 (1999 XG191)
Classification: Jupiter Trojan          SPK-ID: 2020738
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01251304310505574 7.0518e-08  
a 5.161001006691246 1.1642e-07 au
q 5.096421178629282 4.3296e-07 au
i 12.52067652501253 6.178e-06 deg
node 33.21887564021352 2.7848e-05 deg
peri 325.4885249070272 0.00022204 deg
M 321.5926424254673 0.00021948 deg
tp 2459057.389597922137
(2020-Jul-26.88959792)
0.0026071 TDB
period 4282.519434792712
11.72
0.00014491
3.967e-07
d
yr
n .08406266579323188 2.8444e-09 deg/d
Q 5.22558083475321 1.1788e-07 au
  Orbit Determination Parameters
   # obs. used (total)      914  
   data-arc span      12105 days (33.14 yr)  
   first obs. used      1986-09-30  
   last obs. used      2019-11-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55636  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 00:46:41  

Additional Information
 Earth MOID = 4.10118 au 
 Jupiter MOID = .140918 au 
 T_jup = 2.953 
[ 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 MPO449104  

20738 (1999 XG191)          Discovered 1999-Dec-12 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 XG191 = 1997 TU28 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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