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

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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.


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Orbital Elements at Epoch 2454978.5 (2009-May-27.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .239595788730926 0.00076243  
a .8434283322917132 0.0004076 au
q .6413464557782707 0.000953 au
i 10.72762948920467 0.05124 deg
node 240.0387538880537 0.002536 deg
peri 191.217931962027 0.0020445 deg
M 169.0108376130904 0.017335 deg
tp 2454845.674102620834
(2009-Jan-14.17410262)
0.10986 TDB
period 282.924596622413
0.77
0.20509
0.0005615
d
yr
n 1.272423834115952 0.00092238 deg/d
Q 1.045510208805156 0.00050526 au
  Orbit Determination Parameters
   # obs. used (total)      30  
   data-arc span      10 days  
   first obs. used      2009-05-26  
   last obs. used      2009-06-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      8  
   norm. resid. RMS      .49671  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-06 09:00:32  

Additional Information
 Earth MOID = .0259067 au 
 Jupiter MOID = 4.17516 au 
 T_jup = 6.937 
[ show covariance matrix ]

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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