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12431 Webster (1995 YY10)
Classification: Main-belt Asteroid          SPK-ID: 2012431
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.

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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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08407074348738724 6.4709e-08  
a 2.555788992942994 2.17e-08 AU
q 2.340921912109396 1.7176e-07 AU
i 15.64472231821769 9.8513e-06 deg
node 118.0032732374345 2.174e-05 deg
peri 285.0998809457031 6.5378e-05 deg
M 293.4663154298029 6.3132e-05 deg
tp 2457276.319517337374
0.00026247 JED
period 1492.402335492069
n .2412218149479793 3.0722e-09 deg/d
Q 2.770656073776593 2.3525e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      645  
   data-arc span      8316 days (22.77 yr)  
   first obs. used      1992-01-01  
   last obs. used      2014-10-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48968  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Nov-10 13:17:16  

Additional Information
 Earth MOID = 1.40555 AU 
 T_jup = 3.381 
[ 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 13.9 mag n/a MPO263460  

12431 Webster           Discovered 1995 Dec. 18 by Spacewatch at Kitt Peak.
Alan Reginald Webster (b. 1939), a professor in the department of electrical and computer engineering at the University of Western Ontario, has research interests that include meteor astronomy.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020427/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1995 YY10 = 1992 AV6 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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