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390854 (2004 RJ208)
Classification: Main-belt Asteroid          SPK-ID: 2390854
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2913091359637454 7.8316e-08  
a 3.15749277424196 4.4976e-08 au
q 2.237686282365765 2.7052e-07 au
i 13.13083329187787 6.123e-06 deg
node 261.3056690861782 2.8994e-05 deg
peri 52.12817019788822 3.155e-05 deg
M 309.6722999177554 1.1984e-05 deg
tp 2459286.994677629778
(2021-Mar-13.49467763)		 7.2251e-05 TDB
period 2049.330364355485
5.61		 4.3786e-05
1.199e-07		 d
yr
n .1756671380376585 3.7533e-09 deg/d
Q 4.077299266118155 5.8078e-08 au
   Orbit Determination Parameters
   # obs. used (total)      247  
   data-arc span      5769 days (15.79 yr)  
   first obs. used      2004-08-29  
   last obs. used      2020-06-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50734  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 16:37:53  

Additional Information
 Earth MOID = 1.2504 au 
 Jupiter MOID = 1.37721 au 
 T_jup = 3.099 
[ show covariance matrix ]

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.5   n/a MPO397417  
diameter diameter 5.826 km 0.688 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.047   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

390854 (2004 RJ208)          Discovered 2004-Sep-11 by LINEAR at Socorro
Reference: Last Updated: 2014-04-17

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[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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