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442227 (2011 KA31)
Classification: Main-belt Asteroid          SPK-ID: 2442227
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1822880695057761 5.2189e-08  
a 2.361801025497806 2.1554e-08 au
q 1.931272876003048 1.229e-07 au
i 2.301051929987239 5.9809e-06 deg
node 108.2252300221018 0.00022545 deg
peri 182.6954813196484 0.00022699 deg
M 248.7561489041682 2.9206e-05 deg
tp 2459806.172584239045
(2022-Aug-14.67258424)
0.00011083 TDB
period 1325.755346234881
3.63
1.8149e-05
4.969e-08
d
yr
n .2715433137964654 3.7172e-09 deg/d
Q 2.792329174992563 2.5483e-08 au
  Orbit Determination Parameters
   # obs. used (total)      108  
   data-arc span      5575 days (15.26 yr)  
   first obs. used      2004-07-21  
   last obs. used      2019-10-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57709  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 14:43:32  

Additional Information
 Earth MOID = .914661 au 
 Jupiter MOID = 2.38213 au 
 T_jup = 3.527 
[ 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 17.8   n/a MPO495191  

442227 (2011 KA31)          Discovered 2004-Jul-21 by Siding Spring Survey at Siding Spring
Reference: Last Updated: 2015-09-02

Alternate Designations
 2011 KA31 = 2008 SA278 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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