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379973 (2012 SQ21)
Classification: Jupiter Trojan          SPK-ID: 2379973
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01329942689570789 6.576e-08  
a 5.205730218168365 1.5599e-07 au
q 5.136496989693057 4.2795e-07 au
i 5.38198856141157 6.1634e-06 deg
node 89.23932376343953 8.2989e-05 deg
peri 190.8464699187921 0.00037655 deg
M 330.7807857797329 0.0003707 deg
tp 2459352.616960853401
(2021-May-18.11696085)
0.004465 TDB
period 4338.313308210016
11.88
0.000195
5.339e-07
d
yr
n .08298155859760521 3.7299e-09 deg/d
Q 5.274963446643673 1.5807e-07 au
  Orbit Determination Parameters
   # obs. used (total)      270  
   data-arc span      9601 days (26.29 yr)  
   first obs. used      1993-01-25  
   last obs. used      2019-05-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56614  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-26 03:15:21  

Additional Information
 Earth MOID = 4.12021 au 
 Jupiter MOID = .111815 au 
 T_jup = 2.991 
[ 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 13.2   n/a MPO437556  

379973 (2012 SQ21)          Discovered 1995-Mar-26 by Spacewatch at Kitt Peak
Reference: Last Updated: 2013-11-20

Alternate Designations
 2012 SQ21 = 1995 FE9 = 2013 SD58 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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