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243460 (2009 RA54)
Classification: Jupiter Trojan          SPK-ID: 2243460
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01013411936230776 5.4749e-08  
a 5.170863296729611 1.9524e-07 au
q 5.118461150874377 3.6492e-07 au
i 12.70104077654897 7.2303e-06 deg
node 202.5247249337618 2.7218e-05 deg
peri 254.6870614507997 0.00049478 deg
M 229.3708534393436 0.00050056 deg
tp 2460158.905958915393
(2023-Aug-02.40595892)
0.0060271 TDB
period 4294.800662645638
11.76
0.00024325
6.66e-07
d
yr
n .0838222837979718 4.7475e-09 deg/d
Q 5.223265442584845 1.9722e-07 au
  Orbit Determination Parameters
   # obs. used (total)      287  
   data-arc span      8865 days (24.27 yr)  
   first obs. used      1995-06-25  
   last obs. used      2019-10-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53837  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-08 02:15:22  

Additional Information
 Earth MOID = 4.15142 au 
 Jupiter MOID = .187107 au 
 T_jup = 2.951 
[ 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 12.9   n/a MPO433595  
diameter diameter 13.516 km 0.827 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  
geometric albedo albedo 0.061   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  

243460 (2009 RA54)          Discovered 2009-Sep-15 by Spacewatch at Kitt Peak
Reference: 20100626/Numbers.arcLast Updated: 2010-06-28

Alternate Designations
 2009 RA54 = 2002 AT92 = 2008 RZ12 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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