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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1248601321040022 8.8026e-08  
a 3.145508139639957 7.2252e-08 au
q 2.752759577790298 2.8147e-07 au
i 1.185630948141407 6.7488e-06 deg
node 41.54897697862326 0.00048255 deg
peri 99.23573692663108 0.00048363 deg
M 345.3991194978848 3.5874e-05 deg
tp 2459083.143974058118
(2020-Aug-21.64397406)
0.0002049 TDB
period 2037.673731841891
5.58
7.0208e-05
1.922e-07
d
yr
n .1766720522399773 6.0872e-09 deg/d
Q 3.538256701489616 8.1274e-08 au
  Orbit Determination Parameters
   # obs. used (total)      133  
   data-arc span      4498 days (12.31 yr)  
   first obs. used      2007-09-11  
   last obs. used      2020-01-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57112  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-30 09:35:06  

Additional Information
 Earth MOID = 1.76608 au 
 Jupiter MOID = 1.47955 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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