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20234 Billgibson (1998 AV9)
Classification: Main-belt Asteroid          SPK-ID: 2020234
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06460462426247413 3.3132e-08  
a 2.173137318986408 5.1169e-09 au
q 2.032742599022531 7.2009e-08 au
i .5080752204179716 2.9988e-06 deg
node 311.445637619586 0.00037179 deg
peri 210.8054870750092 0.00037245 deg
M 139.4388023003106 2.1809e-05 deg
tp 2458943.278686823842
(2020-Apr-03.77868682)
7.0822e-05 TDB
period 1170.116711071703
3.20
4.1328e-06
1.131e-08
d
yr
n .3076616175067513 1.0866e-09 deg/d
Q 2.313532038950285 5.4475e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2222  
   data-arc span      10082 days (27.60 yr)  
   first obs. used      1993-11-13  
   last obs. used      2021-06-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47892  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 04:57:40  

Additional Information
 Earth MOID = 1.04118 au 
 Jupiter MOID = 2.65424 au 
 T_jup = 3.684 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.89   n/a E2021B10  
diameter diameter 2.613 km 0.121 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.196   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20234 Billgibson           Discovered 1998 Jan. 6 by M. W. Buie at the Anderson Mesa station of the Lowell Observatory.
William C. Gibson (b. 1945) is the payload manager of the New Horizons Pluto Kuiper Belt mission. Additionally, he has been responsible for the development of numerous instruments that have studied the earth's magnetosphere, the planets and comets.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040713/MPCPages.arcLast Updated: 2004-07-14
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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