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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .18238146430376 5.217e-08  
a 2.361719453938353 2.1487e-08 au
q 1.930985601654399 1.2286e-07 au
i 2.301083296817894 5.9808e-06 deg
node 108.2258886907163 0.00022544 deg
peri 182.619403942021 0.00022697 deg
M 141.3319049400441 2.8382e-05 deg
tp 2458480.050495740391
(2018-Dec-27.55049574)
0.00010089 TDB
period 1325.68666369382
3.63
1.8092e-05
4.953e-08
d
yr
n .271557382192347 3.706e-09 deg/d
Q 2.792453306222306 2.5406e-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.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57711  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-08 15:59:49  

Additional Information
 Earth MOID = .914734 au 
 Jupiter MOID = 2.38354 au 
 T_jup = 3.527 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457496.5 (2016-Apr-18.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1827348548272686 5.21e-08  
q 1.929808121942457 1.2272e-07 au
tp 2457155.404961426761
(2015-May-12.90496143)
9.3549e-05 TDB
node 108.2444505206023 0.00022558 deg
peri 182.751046180799 0.00022711 deg
i 2.300779026135255 5.9792e-06 deg
  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.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57711  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-08 15:59:49  

Additional Information
 Jupiter MOID = 2.38354 au 
 T_jup = 3.527 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.714405134714046E-15 -6.328542374707575E-15 1.080844413282476E-12 6.774793465198426E-14 1.988322623330154E-13 -2.991567478399252E-16
q -6.328542374707575E-15 1.505905738280959E-14 -2.029015165079444E-12 -1.581824180311386E-13 -2.991726872142002E-13 7.380300625179609E-16
tp 1.080844413282476E-12 -2.029015165079444E-12 8.75138278560727E-9 1.13170350052263E-10 2.557628089682439E-9 -8.885405871775601E-13
node 6.774793465198426E-14 -1.581824180311386E-13 1.13170350052263E-10 5.088658049848689E-8 -5.08123286474911E-8 3.083889030457852E-10
peri 1.988322623330154E-13 -2.991726872142002E-13 2.557628089682439E-9 -5.08123286474911E-8 5.157959233587716E-8 -3.083621636783153E-10
i -2.991567478399252E-16 7.380300625179609E-16 -8.885405871775601E-13 3.083889030457852E-10 -3.083621636783153E-10 3.575099643515261E-11

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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