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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03867338226145327 6.819e-08  
a 3.13275143118265 6.4464e-08 au
q 3.011597337554409 2.3198e-07 au
i 8.164458219610118 7.1039e-06 deg
node 270.5974118865427 5.3593e-05 deg
peri 280.6696837652058 0.00010753 deg
M 49.58086004708333 9.4694e-05 deg
tp 2458321.567648811238
(2018-Jul-22.06764881)
0.00053155 TDB
period 2025.290532124634
5.54
6.2512e-05
1.711e-07
d
yr
n .1777522751870772 5.4865e-09 deg/d
Q 3.253905524810892 6.6957e-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 = 2.02409 au 
 Jupiter MOID = 1.8153 au 
 T_jup = 3.196 
[ 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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