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13808 Davewilliams (1998 XG24)
Classification: Main-belt Asteroid          SPK-ID: 2013808
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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09029672566716997 8.4497e-08  
a 3.195121754609915 5.6661e-08 AU
q 2.906612722060697 2.8794e-07 AU
i 14.64463945822285 1.1038e-05 deg
node 290.087567517753 3.6173e-05 deg
peri 97.8616867351746 7.5015e-05 deg
M 324.6074260366538 6.9711e-05 deg
tp 2457005.587500775319
(2014-Dec-14.08750078)
0.00040639 JED
period 2086.073207209436
5.71
5.549e-05
1.519e-07
d
yr
n .1725730423821396 4.5905e-09 deg/d
Q 3.483630787159134 6.1777e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      690  
   data-arc span      9721 days (26.61 yr)  
   first obs. used      1986-12-03  
   last obs. used      2013-07-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53943  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Aug-05 17:37:11  

Additional Information
 Earth MOID = 1.95815 AU 
 T_jup = 3.139 
[ 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 11.8 mag n/a MPO266031  

13808 Davewilliams           Discovered 1998 Dec. 11 by Spacewatch at Kitt Peak.
Dave Rhys Williams (b. 1954) flew on space shuttle mission STS-90 after being selected as a Canadian astronaut in 1992. As a physician, he has focused on medical aspects of space flight.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030614/MPCPages.arcLast Updated: 2005-04-26

[ show close-approach data ]
Alternate Designations
 1998 XG24 = 1975 XV5 = 1985 QQ1 = 1986 XB3 = 1993 BD1 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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