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216419 (2008 SJ172)
Classification: Jupiter Trojan          SPK-ID: 2216419
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1291536883807456 5.977e-08  
a 5.280656476997828 1.597e-07 au
q 4.598640215921885 4.309e-07 au
i 9.252789546080448 7.6456e-06 deg
node 318.6443125273613 3.5451e-05 deg
peri 115.9953209158104 4.9341e-05 deg
M 303.220098808099 3.5966e-05 deg
tp 2459899.572845424704
(2022-Nov-16.07284542)
0.00045624 TDB
period 4432.311770010454
12.14
0.00020106
5.505e-07
d
yr
n .08122172326319702 3.6844e-09 deg/d
Q 5.962672738073771 1.8032e-07 au
  Orbit Determination Parameters
   # obs. used (total)      432  
   data-arc span      8885 days (24.33 yr)  
   first obs. used      1996-09-16  
   last obs. used      2021-01-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47687  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 23:54:44  

Additional Information
 Earth MOID = 3.62648 au 
 Jupiter MOID = .431495 au 
 T_jup = 2.957 
[ 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 12.72   n/a E2021B55  
diameter diameter 12.790 km 0.564 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  
geometric albedo albedo 0.118   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  

216419 (2008 SJ172)          Discovered 2008-Sep-21 by CSS at Catalina
Reference: 20090607/Numbers.arcLast Updated: 2009-06-08

Alternate Designations
 2008 SJ172 = 1996 TA33 = 2007 RJ151 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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