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

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1911991801213839 1.5448e-08  
a 2.200501636645099 4.7089e-09 au
q 1.779767527862792 3.3847e-08 au
i 3.85329423212145 1.2056e-06 deg
node 15.74412017625599 9.6315e-06 deg
peri 297.5091809025996 1.1872e-05 deg
M 231.691497775039 6.6999e-06 deg
tp 2459821.446156315673
(2022-Aug-29.94615632)
2.2619e-05 TDB
period 1192.28744487582
3.26
3.8271e-06
1.048e-08
d
yr
n .3019406113409966 9.6919e-10 deg/d
Q 2.621235745427405 5.6092e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2471  
   data-arc span      41196 days (112.79 yr)  
   first obs. used      1908-08-25  
   last obs. used      2021-06-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49071  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 01:02:33  

Additional Information
 Earth MOID = .769401 au 
 Jupiter MOID = 2.65932 au 
 T_jup = 3.638 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457266.5 (2015-Sep-01.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1914004442054743 1.5453e-08  
q 1.778940822776996 3.3857e-08 au
tp 2457437.327820829087
(2016-Feb-18.82782083)
2.1252e-05 TDB
node 15.78392175694448 9.6253e-06 deg
peri 297.5600943200935 1.1868e-05 deg
i 3.855239446640229 1.206e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2471  
   data-arc span      41196 days (112.79 yr)  
   first obs. used      1908-08-25  
   last obs. used      2021-06-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49071  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 01:02:33  

Additional Information
 Jupiter MOID = 2.65932 au 
 T_jup = 3.638 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.387958061105206E-16 -5.199246456918145E-16 5.887147087751988E-14 5.078870916510121E-15 3.034913059216329E-14 2.31706837599994E-15
q -5.199246456918145E-16 1.146273672118473E-15 -1.29543538561599E-13 -1.101768567462875E-14 -6.747125729515916E-14 -5.020335692185407E-15
tp 5.887147087751988E-14 -1.29543538561599E-13 4.516415705285823E-10 -1.850558598346527E-11 1.460136161786464E-10 7.55362499780208E-12
node 5.078870916510121E-15 -1.101768567462875E-14 -1.850558598346527E-11 9.264715952458484E-11 -9.761836518921829E-11 -5.387618327835137E-12
peri 3.034913059216329E-14 -6.747125729515916E-14 1.460136161786464E-10 -9.761836518921829E-11 1.408426689902074E-10 7.661226792226935E-12
i 2.31706837599994E-15 -5.020335692185407E-15 7.55362499780208E-12 -5.387618327835137E-12 7.661226792226935E-12 1.454328121042268E-12

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.36   n/a MPCxxxxx  

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 | Mission Design | Physical Parameters | Discovery Circumstances ]
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