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12431 Webster (1995 YY10)
Classification: Main-belt Asteroid          SPK-ID: 2012431
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08483572775377879 3.9554e-08  
a 2.555601322928121 1.0247e-08 au
q 2.338795024848994 9.916e-08 au
i 15.6453173788611 3.4083e-06 deg
node 117.8874787582588 1.4111e-05 deg
peri 286.1807515703062 2.4381e-05 deg
M 103.1783092293269 1.893e-05 deg
tp 2458772.815028885529
(2019-Oct-16.31502889)
7.8631e-05 TDB
period 1492.237959230356
4.09
8.9746e-06
2.457e-08
d
yr
n .2412483865412963 1.4509e-09 deg/d
Q 2.772407621007249 1.1116e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1704  
   data-arc span      10675 days (29.23 yr)  
   first obs. used      1992-01-01  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45464  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 01:12:31  

Additional Information
 Earth MOID = 1.40242 au 
 Jupiter MOID = 2.5269 au 
 T_jup = 3.381 
[ 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 14.08   n/a MPCxxxxx  
diameter diameter 4.085 km 0.299 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.320   0.099 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

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 | Mission Design | Physical Parameters | Discovery Circumstances ]
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