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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1561136515419791 3.9364e-08  
a 2.400880612360021 1.3292e-08 au
q 2.026070373048155 9.6774e-08 au
i 3.875998933556567 3.9053e-06 deg
node 78.50357287727294 6.6991e-05 deg
peri 137.5457131370212 6.8959e-05 deg
M 57.21014865092205 1.3738e-05 deg
tp 2458984.564100943791
(2020-May-15.06410094)
5.2207e-05 TDB
period 1358.796043942499
3.72
1.1284e-05
3.089e-08
d
yr
n .2649404239914275 2.2001e-09 deg/d
Q 2.775690851671887 1.5367e-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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56737  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 02:39:50  

Additional Information
 Earth MOID = 1.01981 au 
 Jupiter MOID = 2.19342 au 
 T_jup = 3.506 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457720.5 (2016-Nov-28.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .156153164976693 3.9341e-08  
q 2.025131885547694 9.6738e-08 au
tp 2457625.082774225099
(2016-Aug-24.58277423)
5.5544e-05 TDB
node 78.51253650638806 6.6983e-05 deg
peri 137.2097516504998 6.8951e-05 deg
i 3.87669761904933 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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56737  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 02:39:50  

Additional Information
 Jupiter MOID = 2.19342 au 
 T_jup = 3.506 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.547744894440923E-15 -3.780721669823542E-15 -1.270600823374464E-13 -2.245506128058689E-14 4.884550932721211E-15 -2.485809710516094E-15
q -3.780721669823542E-15 9.358329786303929E-15 6.085322291160058E-14 5.545999543537146E-14 -8.348769169753924E-14 6.075770610110809E-15
tp -1.270600823374464E-13 6.085322291160058E-14 3.08509587144774E-9 6.108381109235225E-12 9.261894875267707E-10 1.656098753465786E-12
node -2.245506128058689E-14 5.545999543537146E-14 6.108381109235225E-12 4.486663219964118E-9 -4.474761037877748E-9 -2.882144629905823E-11
peri 4.884550932721211E-15 -8.348769169753924E-14 9.261894875267707E-10 -4.474761037877748E-9 4.754190517332543E-9 2.924826414872434E-11
i -2.485809710516094E-15 6.075770610110809E-15 1.656098753465786E-12 -2.882144629905823E-11 2.924826414872434E-11 1.525796948324035E-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 17.24   n/a E2021B55  

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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