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41800 Robwilliams (2000 WM19)
Classification: Main-belt Asteroid          SPK-ID: 2041800
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2325036344679816 5.9564e-08  
a 2.604789691050902 2.7352e-08 au
q 1.999166620856836 1.5412e-07 au
i 25.00864084914314 1.1173e-05 deg
node 220.4810268528547 1.5628e-05 deg
peri 271.4550458621457 2.854e-05 deg
M 174.1775585400144 2.6003e-05 deg
tp 2456657.571324668104
(2013-Dec-31.07132467)
0.00010655 JED
period 1535.5268805082
4.20
2.4186e-05
6.622e-08
d
yr
n .234447214548829 3.6927e-09 deg/d
Q 3.210412761244968 3.3711e-08 au
  Orbit Determination Parameters
   # obs. used (total)      633  
   data-arc span      6259 days (17.14 yr)  
   first obs. used      1998-06-25  
   last obs. used      2015-08-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55957  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Sep-02 15:39:24  

Additional Information
 Earth MOID = 1.17872 au 
 Jupiter MOID = 2.32381 au 
 T_jup = 3.245 
[ 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 MPO344618  

41800 Robwilliams           Discovered 2000 Nov. 25 by C. W. Juels at Fountain Hills.
Robert A. Williams (b. 1942) is a psychiatrist and author who has been the director of the Biological Psychiatry Institute in Phoenix since 1987. His recent works include Brain Basics (1999)---a book for everyone about biological psychiatry---and the Merry The Cranberry Series of titles about children's values (2002).
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040306/MPCPages.arcLast Updated: 2004-03-08
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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