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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2323632359580738 5.9563e-08  
a 2.605052040431096 2.7411e-08 au
q 1.999733718477344 1.5415e-07 au
i 25.00930758478996 1.1173e-05 deg
node 220.4738672566479 1.5626e-05 deg
peri 271.4705067829452 2.8553e-05 deg
M 221.0451166332689 2.6335e-05 deg
tp 2458193.281096006808
(2018-Mar-15.78109601)
0.00011676 JED
period 1535.758869296018
4.20
2.4239e-05
6.636e-08
d
yr
n .2344117994024815 3.6998e-09 deg/d
Q 3.210370362384849 3.378e-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 = 1.17832 au 
 Jupiter MOID = 2.3237 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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