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312607 (2009 RJ21)
Classification: Main-belt Asteroid          SPK-ID: 2312607
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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04051293528634132 6.7918e-08  
a 3.129841489661342 6.7608e-08 au
q 3.003042423934186 2.334e-07 au
i 8.165576926616772 7.1057e-06 deg
node 270.5830896036588 5.3613e-05 deg
peri 279.0095824462804 0.00010427 deg
M 122.1943329713228 9.1395e-05 deg
tp 2458314.015863116872
(2018-Jul-14.51586312)
0.0005095 TDB
period 2022.469318081428
5.54
6.5532e-05
1.794e-07
d
yr
n .1780002281278147 5.7675e-09 deg/d
Q 3.256640555388499 7.0347e-08 au
  Orbit Determination Parameters
   # obs. used (total)      190  
   data-arc span      4913 days (13.45 yr)  
   first obs. used      2004-10-06  
   last obs. used      2018-03-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57487  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 12:26:28  

Additional Information
 Earth MOID = 2.01621 au 
 Jupiter MOID = 1.81337 au 
 T_jup = 3.197 
[ 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 15.3   n/a MPO437379  

312607 (2009 RJ21)          Discovered 2005-Nov-29 by Spacewatch at Kitt Peak
Reference: 20120109/Numbers.arcLast Updated: 2012-01-11

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