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21499 Perillat (1998 KS4)
Classification: Main-belt Asteroid          SPK-ID: 2021499
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1224538038356156 6.2964e-08  
a 2.446276809717119 1.6653e-08 AU
q 2.146720909132404 1.6081e-07 AU
i 7.992540513256324 6.0354e-06 deg
node 79.0907315831102 4.4323e-05 deg
peri 294.8564119554724 5.0781e-05 deg
M 354.7090722826258 2.5705e-05 deg
tp 2457021.039324291651
9.9842e-05 JED
period 1397.516114369402
n .2575998919071084 2.6305e-09 deg/d
Q 2.745832710301835 1.8693e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      904  
   data-arc span      7975 days (21.83 yr)  
   first obs. used      1993-01-25  
   last obs. used      2014-11-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54127  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Feb-04 13:59:48  

Additional Information
 Earth MOID = 1.16265 AU 
 T_jup = 3.475 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.1 mag n/a MPO302196  

21499 Perillat           Discovered 1998 May 22 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station.
Phil Perillat (b. 1952), senior software specialist at the Arecibo Observatory, has written the primary data-acquisition programs for radar observations of minor planets and other solar system targets during the past several decades.
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

Alternate Designations
 1998 KS4 = 1999 SY10 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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