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JPL Small-Body Database Browser
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39184 Willgrundy (2000 WG166)
Classification: Main-belt Asteroid          SPK-ID: 2039184
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06277554050558497 3.898e-08  
a 2.768876147412572 1.6022e-08 au
q 2.595058450665726 1.0497e-07 au
i 4.302601465541817 4.8977e-06 deg
node 178.5822422009931 5.8256e-05 deg
peri 244.7225567968018 7.4669e-05 deg
M 81.56121139172329 4.438e-05 deg
tp 2458619.228020911734
(2019-May-15.72802091)
0.00020822 TDB
period 1682.882219742317
4.61
1.4607e-05
3.999e-08
d
yr
n .2139187138450623 1.8567e-09 deg/d
Q 2.942693844159418 1.7027e-08 au
  Orbit Determination Parameters
   # obs. used (total)      769  
   data-arc span      9818 days (26.88 yr)  
   first obs. used      1993-03-19  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55315  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 05:07:33  

Additional Information
 Earth MOID = 1.61143 au 
 Jupiter MOID = 2.2555 au 
 T_jup = 3.331 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.4   n/a MPO459135  
diameter diameter 5.494 km 0.119 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.049   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39184 Willgrundy           Discovered 2000 Nov. 24 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station.
William ("Will") M. Grundy (b. 1965), an astronomer at Lowell Observatory, studies icy outer solar system objects. He is involved in the New Horizons mission to Pluto and the Kuiper belt.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20110615/MPCPages.arcLast Updated: 2013-03-28

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Alternate Designations
 2000 WG166 = 1993 FS41 = 1997 AE23 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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