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JPL Small-Body Database Browser
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91275 Billsmith (1999 EW5)
Classification: Main-belt Asteroid          SPK-ID: 2091275
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1446363957087667 5.5272e-08  
a 2.387110597235439 1.6364e-08 au
q 2.041847524293103 1.2655e-07 au
i 2.925335365978635 4.0699e-06 deg
node 125.4328883412741 0.00013129 deg
peri 46.72419288638844 0.00013307 deg
M 272.4519664006424 2.5855e-05 deg
tp 2459328.105461442021
(2021-Apr-23.60546144)
9.9103e-05 TDB
period 1347.122959481219
3.69
1.3852e-05
3.792e-08
d
yr
n .2672361846899537 2.7478e-09 deg/d
Q 2.732373670177774 1.873e-08 au
  Orbit Determination Parameters
   # obs. used (total)      339  
   data-arc span      9097 days (24.91 yr)  
   first obs. used      1994-12-08  
   last obs. used      2019-11-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62516  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 08:47:16  

Additional Information
 Earth MOID = 1.04876 au 
 Jupiter MOID = 2.23313 au 
 T_jup = 3.518 
[ 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 16.5   n/a MPO502690  

91275 Billsmith           Discovered 1999 Mar. 13 by R. A. Tucker at Goodricke-Pigott.
William S. (Bill) Smith Jr. (b. 1947) was for 15 years president of the Association of Universities for Research in Astronomy (AURA), which operates NSO, NOAO, STScI, Gemini and LSST. Bill was a strong advocate for diversity in the astronomical community.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2015-02-03Last Updated: 2015-02-04

[ show close-approach data ]
Alternate Designations
 1999 EW5 = 2001 WF34 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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