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257346 (2009 KA3)
Classification: Main-belt Asteroid          SPK-ID: 2257346
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1558309297279095 3.9348e-08  
a 2.39997489873345 1.3311e-08 au
q 2.025984578940171 9.6729e-08 au
i 3.876604692617449 3.9062e-06 deg
node 78.50554968724333 6.6978e-05 deg
peri 137.4688852021198 6.8955e-05 deg
M 4.284142359245775 1.3857e-05 deg
tp 2458984.338939018548
(2020-May-14.83893902)		 5.2301e-05 TDB
period 1358.027223527422
3.72		 1.1298e-05
3.093e-08		 d
yr
n .2650904148039936 2.2054e-09 deg/d
Q 2.773965218526729 1.5385e-08 au
   Orbit Determination Parameters
   # obs. used (total)      314  
   data-arc span      6495 days (17.78 yr)  
   first obs. used      2002-08-13  
   last obs. used      2020-05-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56732  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-11 23:24:44  

Additional Information
 Earth MOID = 1.02081 au 
 Jupiter MOID = 2.1962 au 
 T_jup = 3.507 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457720.5 (2016-Nov-28.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1561531654064702 3.9341e-08  
q 2.025131884275218 9.6738e-08 au
tp 2457625.082776379221
(2016-Aug-24.58277638)		 5.5544e-05 TDB
node 78.51253655159606 6.6983e-05 deg
peri 137.2097521100262 6.8951e-05 deg
i 3.876697627416895 3.9061e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      314  
   data-arc span      6495 days (17.78 yr)  
   first obs. used      2002-08-13  
   last obs. used      2020-05-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56732  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-11 23:24:44  

Additional Information
 Jupiter MOID = 2.1962 au 
 T_jup = 3.507 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.547744666321769E-15 -3.780721482057943E-15 -1.270603581895165E-13 -2.24550318482311E-14 4.884458873016232E-15 -2.485809198362217E-15
q -3.780721482057943E-15 9.358330481018547E-15 6.085345312273294E-14 5.545988355231223E-14 -8.348752234575254E-14 6.075769924167886E-15
tp -1.270603581895165E-13 6.085345312273294E-14 3.085095096123429E-9 6.108473642185205E-12 9.261890717549676E-10 1.656099799573176E-12
node -2.24550318482311E-14 5.545988355231223E-14 6.108473642185205E-12 4.486663311238394E-9 -4.474761107885712E-9 -2.882144255681506E-11
peri 4.884458873016232E-15 -8.348752234575254E-14 9.261890717549676E-10 -4.474761107885712E-9 4.754190458760225E-9 2.924826069588353E-11
i -2.485809198362217E-15 6.075769924167886E-15 1.656099799573176E-12 -2.882144255681506E-11 2.924826069588353E-11 1.525796887393269E-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 17.1   n/a MPO418369  

257346 (2009 KA3)          Discovered 2009-May-20 by Lowe, A. at Mayhill
Reference: 20101128/Numbers.arcLast Updated: 2010-12-06
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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