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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01040895348646619 5.367e-08  
a 5.172339389282035 1.9238e-07 au
q 5.118500749162782 3.7029e-07 au
i 12.69983130897848 7.1476e-06 deg
node 202.5292228203263 2.6924e-05 deg
peri 252.3095209723469 0.00048055 deg
M 265.3145942639646 0.00048732 deg
tp 2460130.580787271624
(2023-Jul-05.08078727)
0.0058556 TDB
period 4296.639806898495
11.76
0.00023971
6.563e-07
d
yr
n .08378640430179879 4.6745e-09 deg/d
Q 5.226178029401289 1.9438e-07 au
  Orbit Determination Parameters
   # obs. used (total)      291  
   data-arc span      8909 days (24.39 yr)  
   first obs. used      1995-06-25  
   last obs. used      2019-11-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54052  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 16:29:08  

Additional Information
 Earth MOID = 4.15077 au 
 Jupiter MOID = .1868 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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