SIMPLE  =                    T / Standard FITS format                           
BITPIX  =                    8 / Character information                          
NAXIS   =                    0 / No image data array present                    
EXTEND  =                    T / There may be standard extensions               
BLOCKED =                    T / The file may be blocked                        
ORIGIN  = 'ADC     '           / This file written at the ADC, NASA/GSFC        
DATE    = '23/09/91'           / Date file written (dd/mm/yy)                   
                                                                                
COMMENT                Catalogue of Constellation Boundary Data                 
COMMENT                                                                         
COMMENT The machine-readable Catalogue of Constellation Boundary Data is        
COMMENT presented in a form suitable for the construction of star charts and    
COMMENT atlases.  Two files are available, one for equator and equinox 1875 and 
COMMENT the other for equator and equinox 2000.  The first gives the boundaries 
COMMENT as delineated by Delporte, in their original orientation.  The second   
COMMENT file gives the boundaries computed for equator and equinox 2000.  In    
COMMENT equator and equinox 1875 the lines joining the corners of the           
COMMENT constellations were great circles of right ascension and parallels of   
COMMENT declination.  However, precession to equator and equinox 2000 distorts  
COMMENT the boundaries so that they no longer lie along lines of constant right 
COMMENT ascension or declination.  Thus, prior to precession to equator and     
COMMENT equinox 2000, points were interpolated at one degree intervals along the
COMMENT boundaries in order that they should continue to enclose the same area  
COMMENT of sky (and thus the same set of stars).                                
COMMENT                                                                         
COMMENT Source Catalog Reference:  Davenhall, A.C. and Leggett, S.K. 1989       
COMMENT                                                                         
COMMENT A copy of the documentation should accompany any computer-readable      
COMMENT version of the catalog.  The FITS Table header(s) in this file only give
COMMENT the basic format of the catalog.  Please refer to the documentation or  
COMMENT source reference for a more detailed discussion of the data.            
                                                                                
END