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(2009 KR21)
Classification: Apollo [NEO]          SPK-ID: 3462071
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

[ hide orbit diagram ]
Orbit Diagram
Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using 2-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet has stopped working because of a recent Java upgrade, here is a possible workaround.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2454983.5 (2009-Jun-01.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5194679223586076 0.0018176  
a 1.730378982527878 0.0056029 au
q .8315026075811198 0.00045527 au
i 2.359890277507715 0.0083015 deg
node 69.30951509688586 0.00088472 deg
peri 243.2293746706919 0.01082 deg
M 340.6521163942812 0.11172 deg
tp 2455028.182888425132
0.041141 JED
period 831.4004860093789
n .4330043174835705 0.0021031 deg/d
Q 2.629255357474636 0.0085134 au
  Orbit Determination Parameters
   # obs. used (total)      17  
   first obs. used      2009-05-31  
   last obs. used      2009-05-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      8  
   fit RMS      .44898  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-13 10:47:49  

Additional Information
 Earth MOID = .00110063 au 
 Jupiter MOID = 2.67915 au 
 T_jup = 3.992 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 26.7 mag n/a MPO158656  

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2009-Jun-01 06:09 < 00:01 Moon 0.00106868391574499 0.00106811176991382 0.00106972438498648 13.8669249239165 13.8647132353699 2454983.756316661 0.944116873025243 1063.42495641035 6.66987490724382 88.5219943158256 23360.6227668619 T 6 CATAB v2.0c-linF95 2014-Jun-13 10:47:52 2014-Jun-13 10:47
2009-Jun-01 10:07 < 00:01 Earth 0.0018953342297596 0.0018735155425608 0.00191716652858809 12.9768212766676 12.8680329090636 2454983.921639802 0.436814384732514 1104.09960898808 1.93514766971558 0.913446233888966 190.841262219594 T 6 CATAB v2.0c-linF95 2014-Jun-13 10:47:52 2014-Jun-13 10:47
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]
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