Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
5642 Bobbywilliams (1990 OK1)
Classification: Mars-crossing Asteroid          SPK-ID: 2005642
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 2 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3336892321793479 1.1979e-07  
a 2.31477412824345 1.7672e-08 AU
q 1.542358926721273 2.8134e-07 AU
i 24.98422063529889 1.7246e-05 deg
node 310.1813983588881 1.8519e-05 deg
peri 38.9483332471929 2.8982e-05 deg
M 315.3684865445691 2.5585e-05 deg
tp 2457159.977885833693
(2015-May-17.47788583)
9.2816e-05 JED
period 1286.356532754847
3.52
1.4731e-05
4.033e-08
d
yr
n .2798602026990356 3.2049e-09 deg/d
Q 3.087189329765625 2.3569e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      486  
   data-arc span      13858 days (37.94 yr)  
   first obs. used      1975-04-09  
   last obs. used      2013-03-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .61216  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 18:14:19  

Additional Information
 Earth MOID = .581199 AU 
 T_jup = 3.388 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.0 mag n/a MPO256905  
rotation period rot_per 4.8341 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Published Reference List:
[Oey, J. (2012) Minor Planet Bul. 39, 145-147.]

5642 Bobbywilliams           Discovered 1990 July 27 by H. E. Holt at Palomar.
Named in honor of Bobby G. Williams (b. 1951), celestial mechanics and spacecraft navigation expert at the Jet Propulsion Laboratory. Williams has been a leader of the navigation effort for the NEAR mission to (253) Mathilde and (433) Eros. Name suggested and citation provided by J. Veverka and D. K. Yeomans.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990728/MPCPages.arcLast Updated: 2010-06-11

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2014-Oct-26 05:12 UT
(server date/time)  
NASA Home Page
Site Manager:   Donald K. Yeomans
Webmaster  Alan B. Chamberlin