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JPL Small-Body Database Browser
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379121 (2009 AO21)
Classification: Main-belt Asteroid          SPK-ID: 2379121
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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1250259828271012 9.2971e-08  
a 3.145227630607987 7.9644e-08 au
q 2.751992454876269 2.887e-07 au
i 1.185873537942557 6.8778e-06 deg
node 41.55800144684172 0.00049716 deg
peri 99.33888856674675 0.00049823 deg
M 274.6431070387439 3.626e-05 deg
tp 2459083.572870002516
(2020-Aug-22.07287000)
0.00021765 TDB
period 2037.401165478721
5.58
7.7387e-05
2.119e-07
d
yr
n .1766956876729832 6.7115e-09 deg/d
Q 3.538462806339705 8.9602e-08 au
  Orbit Determination Parameters
   # obs. used (total)      125  
   data-arc span      4043 days (11.07 yr)  
   first obs. used      2007-09-11  
   last obs. used      2018-10-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5945  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 11:44:23  

Additional Information
 Earth MOID = 1.76574 au 
 Jupiter MOID = 1.48065 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 16.4   n/a MPO418927  

379121 (2009 AO21)          Discovered 2009-Jan-03 by Spacewatch at Kitt Peak
Reference: Last Updated: 2013-11-20

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