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JPL Small-Body Database Browser
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41800 Robwilliams (2000 WM19)
Classification: Main-belt Asteroid          SPK-ID: 2041800
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2324156007411229 5.1881e-08  
a 2.606275531000154 1.5798e-08 au
q 2.000536437765864 1.3754e-07 au
i 25.00212055351732 7.1793e-06 deg
node 220.4642377743149 1.421e-05 deg
peri 271.6575880701466 2.0258e-05 deg
M 95.24018050295744 1.5754e-05 deg
tp 2458193.919424797098
(2018-Mar-16.41942480)
6.6205e-05 TDB
period 1536.840924702989
4.21
1.3973e-05
3.826e-08
d
yr
n .2342467552844311 2.1298e-09 deg/d
Q 3.212014624234444 1.9469e-08 au
  Orbit Determination Parameters
   # obs. used (total)      887  
   data-arc span      7625 days (20.88 yr)  
   first obs. used      1998-06-25  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52881  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 04:20:27  

Additional Information
 Earth MOID = 1.17976 au 
 Jupiter MOID = 2.3199 au 
 T_jup = 3.244 
[ 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 14.0   n/a MPO436067  
diameter diameter 8.100 km 0.058 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.075   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

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 | Mission Design | Physical Parameters | Discovery Circumstances ]
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