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21964 Kevinhousen (1999 VK213)
Classification: Outer Main-belt Asteroid          SPK-ID: 2021964
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0371815273648351 5.2667e-08  
a 3.211831284590416 3.839e-08 au
q 3.092410491791184 1.6809e-07 au
i 13.75807157111834 7.2675e-06 deg
node 201.520818471873 2.4198e-05 deg
peri 261.7027666603656 0.00012031 deg
M 273.3837081016388 0.00012325 deg
tp 2458106.353313905491
0.00072365 JED
period 2102.458890986331
n .1712280803888215 3.07e-09 deg/d
Q 3.331252077389648 3.9817e-08 au
  Orbit Determination Parameters
   # obs. used (total)      740  
   data-arc span      10239 days (28.03 yr)  
   first obs. used      1987-08-31  
   last obs. used      2015-09-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51303  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Oct-05 14:08:55  

Additional Information
 Earth MOID = 2.14521 au 
 Jupiter MOID = 1.7639 au 
 T_jup = 3.145 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.7 mag n/a MPO302199  

21964 Kevinhousen           Discovered 1999 Nov. 13 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station.
Kevin R. Housen (b. 1953) is an associate technical fellow at the Boeing Corporation. A pioneer in the study of shock physics as applied to asteroidal materials, his work has included modeling the production of asteroidal regoliths and developing crater formation and disruptive collision scaling laws.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20080718/MPCPages.arcLast Updated: 2008-07-18

[ show close-approach data ]
Alternate Designations
 1999 VK213 = 1987 QD4 = 1990 EG2 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2016-May-04 01:53 UT
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