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13808 Davewilliams (1998 XG24)
Classification: Main-belt Asteroid          SPK-ID: 2013808
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08921111446289431 1.5973e-08  
a 3.193542424906468 1.2643e-08 au
q 2.908642946096028 4.965e-08 au
i 14.67200721024311 3.8785e-07 deg
node 289.6871305073449 3.1011e-06 deg
peri 101.5309728694751 1.6584e-05 deg
M 15.25262404810354 1.4406e-05 deg
tp 2459112.181938771419
(2020-Sep-19.68193877)
8.337e-05 TDB
period 2084.526697964631
5.71
1.2378e-05
3.389e-08
d
yr
n .1727010742301887 1.0255e-09 deg/d
Q 3.478441903716908 1.3771e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2519  
   data-arc span      16533 days (45.26 yr)  
   first obs. used      1975-12-04  
   last obs. used      2021-03-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41189  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 00:08:24  

Additional Information
 Earth MOID = 1.96037 au 
 Jupiter MOID = 1.93498 au 
 T_jup = 3.139 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.07   n/a E2021B10  
diameter diameter 22.569 km 0.160 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.037   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

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

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