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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2915947884740457 7.8247e-08  
a 3.159245849672919 4.5107e-08 au
q 2.238026224400037 2.7063e-07 au
i 13.12811311975228 6.122e-06 deg
node 261.3047153384808 2.9e-05 deg
peri 52.05869814096807 3.1553e-05 deg
M 344.8579938599957 1.2449e-05 deg
tp 2459286.768943509711
(2021-Mar-13.26894351)
7.2173e-05 TDB
period 2051.037318063537
5.62
4.3926e-05
1.203e-07
d
yr
n .1755209409548383 3.759e-09 deg/d
Q 4.080465474945801 5.826e-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 = 1.24876 au 
 Jupiter MOID = 1.37349 au 
 T_jup = 3.099 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457314.5 (2015-Oct-19.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .290143938638799 7.8354e-08  
q 2.243300057772123 2.7076e-07 au
tp 2457237.942717983526
(2015-Aug-03.44271798)
5.3892e-05 TDB
node 261.3042792320343 2.8996e-05 deg
peri 52.27477351512584 3.1585e-05 deg
i 13.12454813261807 6.1202e-06 deg
  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
 Jupiter MOID = 1.37349 au 
 T_jup = 3.099 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.139317048850236E-15 -2.113774782863541E-14 1.000126632836116E-13 7.497461279849211E-14 -1.777390705094396E-14 -4.738463117925885E-14
q -2.113774782863541E-14 7.331233206999689E-14 -1.489490435422805E-13 -2.51195370024284E-13 9.939110676991867E-14 1.661402848713075E-13
tp 1.000126632836116E-13 -1.489490435422805E-13 2.904378246699738E-9 3.4021277500844E-13 7.237256305659595E-10 -7.769337345184318E-13
node 7.497461279849211E-14 -2.51195370024284E-13 3.4021277500844E-13 8.407591891475008E-10 -8.182486572341517E-10 2.076868461116238E-11
peri -1.777390705094396E-14 9.939110676991867E-14 7.237256305659595E-10 -8.182486572341517E-10 9.976003680556044E-10 -2.093714230637374E-11
i -4.738463117925885E-14 1.661402848713075E-13 -7.769337345184318E-13 2.076868461116238E-11 -2.093714230637374E-11 3.745720646373566E-11

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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