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120454 (1988 SJ2)
Classification: Jupiter Trojan          SPK-ID: 2120454
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05387506172995832 5.9941e-08  
a 5.206745731377906 1.1003e-07 au
q 4.926231983687724 3.8497e-07 au
i 15.27474771398339 5.0796e-06 deg
node 169.2260703253275 1.9918e-05 deg
peri 127.6067980376492 5.6652e-05 deg
M 324.1945306620563 5.2866e-05 deg
tp 2459632.113332379612
(2022-Feb-21.61333238)
0.0006369 TDB
period 4339.582821555148
11.88
0.00013755
3.766e-07
d
yr
n .08295728294707119 2.6295e-09 deg/d
Q 5.487259479068087 1.1596e-07 au
  Orbit Determination Parameters
   # obs. used (total)      479  
   data-arc span      11627 days (31.83 yr)  
   first obs. used      1988-09-16  
   last obs. used      2020-07-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49764  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 17:57:03  

Additional Information
 Earth MOID = 3.93361 au 
 Jupiter MOID = .0758089 au 
 T_jup = 2.927 
[ 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 12.77   n/a E2021B55  
diameter diameter 16.717 km 0.464 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  
geometric albedo albedo 0.033   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  

120454 (1988 SJ2)          Discovered 1988-Sep-16 by Bus, S. J. at Cerro Tololo
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

Alternate Designations
 1988 SJ2 = 2000 TR47 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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