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(2009 KR4)
Classification: Aten [NEO]          SPK-ID: 3461231
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ 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 2454979.5 (2009-May-28.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2394539602130646 0.00080596  
a .8435063170278556 0.00043112 au
q .6415253889507989 0.0010077 au
i 10.71919892907828 0.054102 deg
node 240.0388132501068 0.0026666 deg
peri 191.2155505157994 0.0021163 deg
M 170.2908996849702 0.017402 deg
tp 2454845.649537819894
(2009-Jan-14.14953782)
0.11624 TDB
period 282.9638370222966
0.77
0.21694
0.0005939
d
yr
n 1.272247378987984 0.00097537 deg/d
Q 1.045487245104912 0.00053435 au
  Orbit Determination Parameters
   # obs. used (total)      31  
   data-arc span      10 days  
   first obs. used      2009-05-26  
   last obs. used      2009-06-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      8  
   norm. resid. RMS      .42692  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 02:45:49  

Additional Information
 Earth MOID = .0258827 au 
 Jupiter MOID = 4.17508 au 
 T_jup = 6.937 
[ hide covariance matrix ]
Orbit Covariance (6×6)
  e q tp node peri i
e 6.495776136724412E-7 -8.121851860813329E-7 9.367706400402654E-5 -2.140265480121572E-6 -1.528284796946721E-6 4.360319776082025E-5
q -8.121851860813329E-7 1.015498873011844E-6 -.0001171284486912689 2.675819058388756E-6 1.910086775776186E-6 -5.451793725936815E-5
tp 9.367706400402654E-5 -.0001171284486912689 .01351193713096559 -.000308275362681331 -.0002189051525252094 .006287520170327294
node -2.140265480121572E-6 2.675819058388756E-6 -.000308275362681331 7.110665645828761E-6 5.250516677324366E-6 -.0001437551853430655
peri -1.528284796946721E-6 1.910086775776186E-6 -.0002189051525252094 5.250516677324366E-6 4.47879520559666E-6 -.0001029251984493435
i 4.360319776082025E-5 -5.451793725936815E-5 .006287520170327294 -.0001437551853430655 -.0001029251984493435 .002927052740133959

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 25.0   n/a MPO159143  

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