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212925 (2008 AL31)
Classification: Outer Main-belt Asteroid          SPK-ID: 2212925
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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04113579608689189 1.2453e-07  
a 3.212269389822748 6.0272e-08 au
q 3.080130131226835 4.2766e-07 au
i 10.36147806212784 1.31e-05 deg
node 303.5504882291004 4.7833e-05 deg
peri 354.8222503785241 0.00013255 deg
M 230.9098930818687 0.0001265 deg
tp 2459754.561600477477
(2022-Jun-24.06160048)
0.00074297 TDB
period 2102.889079982347
5.76
5.9185e-05
1.62e-07
d
yr
n .1711930521808702 4.8182e-09 deg/d
Q 3.344408648418661 6.2752e-08 au
  Orbit Determination Parameters
   # obs. used (total)      164  
   data-arc span      5369 days (14.70 yr)  
   first obs. used      2005-08-06  
   last obs. used      2020-04-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54738  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 08:51:17  

Additional Information
 Earth MOID = 2.0646 au 
 Jupiter MOID = 1.86266 au 
 T_jup = 3.164 
[ 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 15.8   n/a MPO422828  

212925 (2008 AL31)          Discovered 2008-Jan-10 by Calvin College at Calvin-Rehoboth
Reference: 20090409/Numbers.arcLast Updated: 2009-04-10

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