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21563 Chetgervais (1998 QW95)
Classification: Main-belt Asteroid          SPK-ID: 2021563
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1531996590499417 5.7718e-08  
a 2.786723530519681 2.9168e-08 au
q 2.359798435777616 1.6807e-07 au
i 7.778991165071087 7.4969e-06 deg
node 222.2450806155537 5.2417e-05 deg
peri 43.05743338416362 6.0209e-05 deg
M 7.768004034929347 3.3609e-05 deg
tp 2457563.835463797327
0.00015834 JED
period 1699.179476942997
n .211866965723761 3.3263e-09 deg/d
Q 3.213648625261747 3.3636e-08 au
  Orbit Determination Parameters
   # obs. used (total)      681  
   data-arc span      7499 days (20.53 yr)  
   first obs. used      1994-11-29  
   last obs. used      2015-06-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49682  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Feb-25 19:33:28  

Additional Information
 Earth MOID = 1.35126 au 
 Jupiter MOID = 1.86602 au 
 T_jup = 3.300 
[ 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 14.4 mag n/a MPO337440  

21563 Chetgervais           Discovered 1998 Aug. 19 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Chetley L. C. Gervais (b. 1988) was awarded first place in the 2005 Intel International Science and Engineering Fair for his medicine and health project. He attends the Sandwich Secondary School, LaSalle, Ontario, Canada.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050822/MPCPages.arcLast Updated: 2005-08-26

[ show close-approach data ]
Alternate Designations
 1998 QW95 = 1994 WN9 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2016-Apr-29 01:55 UT
(server date/time)  
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