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312259 (2008 AR20)
Classification: Main-belt Asteroid          SPK-ID: 2312259
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1075981116279066 1.0659e-07  
a 2.655744644673055 3.1608e-08 au
q 2.369991535940308 2.7366e-07 au
i 5.065975948328762 9.5774e-06 deg
node 333.5931045543451 7.0187e-05 deg
peri 196.8286293609281 7.5171e-05 deg
M 279.1399205143528 2.5955e-05 deg
tp 2459355.566387511298
(2021-May-21.06638751)
0.00011539 TDB
period 1580.803535157994
4.33
2.8221e-05
7.726e-08
d
yr
n .2277322842424057 4.0656e-09 deg/d
Q 2.941497753405801 3.5009e-08 au
  Orbit Determination Parameters
   # obs. used (total)      124  
   data-arc span      4766 days (13.05 yr)  
   first obs. used      2006-10-17  
   last obs. used      2019-11-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52247  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 21:31:43  

Additional Information
 Earth MOID = 1.37664 au 
 Jupiter MOID = 2.03569 au 
 T_jup = 3.374 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.9   n/a MPO455301  

312259 (2008 AR20)          Discovered 2008-Jan-10 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20120109/Numbers.arcLast Updated: 2012-01-11
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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