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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 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5195714576355692 0.001211  
a 1.73069570841246 0.0037186 AU
q .8314756164689742 0.00031092 AU
i 2.36040292646406 0.0058605 deg
node 69.309465935 0.00057348 deg
peri 243.229989300779 0.008076 deg
M 340.6583848866301 0.073826 deg
tp 2455028.180676298189
0.026633 JED
period 831.6287638372679
n .4328854600205295 0.0013952 deg/d
Q 2.629915800355946 0.0056507 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      .69126  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Aug-05 11:03:43  

Additional Information
 Earth MOID = .00110089 AU 
 T_jup = 3.991 
[ 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 0.00106866725586329 0.00106820392778646 0.00106935629353804 13.8692580202696 13.8670466693583 2454983.756358158 0.683278206733777 745.930819865536 4.1331597002271 88.4704590677508 37696.8259843577 T 5 CATAB v2.0c-linF95 2013-Aug-05 11:03:46 2013-Aug-05 11:03
2009-Jun-01 10:07 < 00:01 Earth 0.00189578412836466 0.0018804249232279 0.00191114571616352 12.9791450537879 12.8704022497279 2454983.921653665 0.326780185231823 768.146135912712 1.33307489783654 0.919292530892786 274.413226335272 T 5 CATAB v2.0c-linF95 2013-Aug-05 11:03:46 2013-Aug-05 11:03
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]
FirstGov 2014-Apr-23 17:02 UT
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