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JPL Small-Body Database Browser
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(2009 KR21)
Classification: Apollo [NEO]          SPK-ID: 3462071
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.


Orbital Elements at Epoch 2454983.5 (2009-Jun-01.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5195451471087045 0.0026184  
a 1.730616961874994 0.0080076 au
q .8314833178288312 0.000687 au
i 2.360237481368559 0.0133 deg
node 69.3094783464099 0.0012082 deg
peri 243.2296723270242 0.019188 deg
M 340.6568576471163 0.15843 deg
tp 2455028.181154685777
(2009-Jul-15.68115469)
0.056038 TDB
period 831.5720059042918
2.28
5.7715
0.0158
d
yr
n .4329150060896031 0.0030046 deg/d
Q 2.629750605921158 0.012168 au
  Orbit Determination Parameters
   # obs. used (total)      17  
   first obs. used      2009-05-31  
   last obs. used      2009-05-31  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      8  
   norm. resid. RMS      .35133  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 02:46:07  

Additional Information
 Earth MOID = .00110081 au 
 Jupiter MOID = 2.67867 au 
 T_jup = 3.991 
[ 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 26.7   n/a MPO158656  

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