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18747 Lexcen (1999 FN21)
Classification: Main-belt Asteroid          SPK-ID: 2018747
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1203500358374273 1.2432e-08  
a 2.169242796650376 5.2508e-09 au
q 1.908174348333422 2.6871e-08 au
i 3.316071827121793 6.3857e-07 deg
node 306.3640676049524 1.0145e-05 deg
peri 296.9646446598883 1.095e-05 deg
M 255.9083482707171 6.7715e-06 deg
tp 2459537.922525809965
(2021-Nov-19.42252581)
2.2366e-05 TDB
period 1166.972636840336
3.19
4.2371e-06
1.16e-08
d
yr
n .3084905238007349 1.1201e-09 deg/d
Q 2.43031124496733 5.8828e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2165  
   data-arc span      15952 days (43.67 yr)  
   first obs. used      1977-07-20  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47631  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:46:52  

Additional Information
 Earth MOID = .8963 au 
 Jupiter MOID = 2.58762 au 
 T_jup = 3.679 
[ 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 14.64   n/a MPCxxxxx  

18747 Lexcen           Discovered 1999 Mar. 26 by J. Broughton at Reedy Creek Observatory.
Ben Lexcen (1936-1988) was the amiable Australian marine architect who designed Australia II, the yacht with the revolutionary winged keel that won the 1983 America's Cup, to the surprise of the yachting world.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010705/MPCPages.arcLast Updated: 2009-05-11

Alternate Designations
 1999 FN21 = 1989 EN6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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