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7327 Crawford (1983 RZ1)
Classification: Main-belt Asteroid          SPK-ID: 2007327
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

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Orbit Diagram
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Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1915145783690201 4.437e-08  
a 2.200301388912129 7.506e-09 au
q 1.778911596129854 9.9274e-08 au
i 3.855218959772882 6.4816e-06 deg
node 15.78221068325678 6.4114e-05 deg
peri 297.5364010742495 6.6704e-05 deg
M 49.29159242687379 2.0486e-05 deg
tp 2457437.272986619220
6.7508e-05 JED
period 1192.124699648454
n .3019818313521737 1.5453e-09 deg/d
Q 2.621691181694405 8.9435e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1219  
   data-arc span      39013 days (106.81 yr)  
   first obs. used      1908-08-25  
   last obs. used      2015-06-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54756  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 11:56:33  

Additional Information
 Earth MOID = .768675 au 
 Jupiter MOID = 2.65073 au 
 T_jup = 3.638 
[ 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 14.3 mag n/a MPO337317  

7327 Crawford           Discovered 1983 Sept. 6 by E. Bowell at the Anderson Mesa Station of Lowell Observatory.
Named in honor of David L. Crawford (b. 1931), astronomer at the Kitt Peak National Observatory recognized for his fundamental contributions to protecting dark skies around observatories from light pollution through good outdoor lighting practices. In 1972 he was instrumental in establishing the first comprehensive lighting code, which regulated outdoor lighting in southern Arizona, and the code has become a model for such regulation throughout the world. Crawford was cofounder and executive director of the International Dark-Sky Association, a worldwide organization dedicated to the preservation of dark skies. He was also responsible for establishing the fundamental standards of the Strömgren photometric system. Name suggested and citation provided by D. R. Davis.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990402/MPCPages.arcLast Updated: 2010-06-11

Alternate Designations
 1983 RZ1 = 1976 JC7 = 1980 VD4 = A908 QC 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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