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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2915947911108775 7.8095e-08  
a 3.159245851424945 4.5094e-08 au
q 2.238026217310782 2.7016e-07 au
i 13.12811248840524 5.9474e-06 deg
node 261.3047158867909 2.8981e-05 deg
peri 52.05869456801614 3.1217e-05 deg
M 344.8579954247659 1.2186e-05 deg
tp 2459286.768934666469
(2021-Mar-13.26893467)
7.0697e-05 TDB
period 2051.037319769705
5.62
4.3914e-05
1.202e-07
d
yr
n .1755209408088301 3.758e-09 deg/d
Q 4.080465485539109 5.8243e-08 au
  Orbit Determination Parameters
   # obs. used (total)      251  
   data-arc span      5769 days (15.79 yr)  
   first obs. used      2004-08-29  
   last obs. used      2020-06-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50558  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 11:25:03  

Additional Information
 Earth MOID = 1.24876 au 
 Jupiter MOID = 1.37349 au 
 T_jup = 3.099 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457376.5 (2015-Dec-20.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .290134765960842 7.82e-08  
q 2.243261659228445 2.7031e-07 au
tp 2457237.920283682552
(2015-Aug-03.42028368)
5.1848e-05 TDB
node 261.3021843869963 2.8978e-05 deg
peri 52.26916706598583 3.1245e-05 deg
i 13.12452744078102 5.9456e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      251  
   data-arc span      5769 days (15.79 yr)  
   first obs. used      2004-08-29  
   last obs. used      2020-06-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50558  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 11:25:03  

Additional Information
 Jupiter MOID = 1.37349 au 
 T_jup = 3.099 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.11530831976951E-15 -2.106126753082794E-14 1.62148829044107E-13 7.221911059327056E-14 3.618744448269915E-15 -4.400505201714295E-14
q -2.106126753082794E-14 7.306895549049895E-14 -3.456266954663635E-13 -2.419607868736459E-13 3.112916055507934E-14 1.543993351661724E-13
tp 1.62148829044107E-13 -3.456266954663635E-13 2.688212533035728E-9 1.21396547763295E-12 6.573029749926104E-10 -6.023290038367755E-13
node 7.221911059327056E-14 -2.419607868736459E-13 1.21396547763295E-12 8.397010829517188E-10 -8.169714356324659E-10 2.227130957900559E-11
peri 3.618744448269915E-15 3.112916055507934E-14 6.573029749926104E-10 -8.169714356324659E-10 9.762227906323901E-10 -2.232301230075788E-11
i -4.400505201714295E-14 1.543993351661724E-13 -6.023290038367755E-13 2.227130957900559E-11 -2.232301230075788E-11 3.534983225090423E-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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