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295529 (2008 RK121)
Classification: Jupiter Trojan          SPK-ID: 2295529
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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1397670016691895 1.2574e-07  
a 5.229550137472038 2.1492e-07 au
q 4.498631594678874 7.879e-07 au
i 5.358186967645577 1.0722e-05 deg
node 189.505577941628 9.1716e-05 deg
peri 188.7722992089472 9.7597e-05 deg
M 337.8404176373448 4.1127e-05 deg
tp 2459269.377210470736
(2021-Feb-23.87721047)
0.0005087 TDB
period 4368.123648963342
11.96
0.00026928
7.372e-07
d
yr
n .08241524941388426 5.0806e-09 deg/d
Q 5.960468680265202 2.4496e-07 au
  Orbit Determination Parameters
   # obs. used (total)      131  
   data-arc span      8377 days (22.93 yr)  
   first obs. used      1996-09-20  
   last obs. used      2019-08-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62428  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 05:43:19  

Additional Information
 Earth MOID = 3.50082 au 
 Jupiter MOID = .457589 au 
 T_jup = 2.972 
[ 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 13.8   n/a MPO494581  
diameter diameter 11.283 km 1.297 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  
geometric albedo albedo 0.042   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  

295529 (2008 RK121)          Discovered 2008-Sep-02 by Spacewatch at Kitt Peak
Reference: 20110912/Numbers.arcLast Updated: 2011-09-14
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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