Identification of a Constellation From Position

Comments describe the format in which the positions must be entered. The main program is followed by a precession subroutine which permits the use of positions at any epoch. The file data.dat is a list of constellation boundaries in the form Lower Right Ascension, Upper Right Ascension, Lower Declination, three letter abbreviation for the Constellation.

The following is an example of the output of the program: RA = 9.0000 DEC = 65.0000 IS IN CONSTELLATION UMa RA = 23.5000 DEC = -20.0000 IS IN CONSTELLATION Aqr RA = 5.1200 DEC = 9.1200 IS IN CONSTELLATION Ori RA = 9.4555 DEC = -19.9000 IS IN CONSTELLATION Hya RA = 12.8888 DEC = 22.0000 IS IN CONSTELLATION Com RA = 15.6687 DEC = -12.1234 IS IN CONSTELLATION Lib RA = 19.0000 DEC = -40.0000 IS IN CONSTELLATION CrA RA = 6.2222 DEC = -81.1234 IS IN CONSTELLATION Men END OF INPUT POSITIONS AFTER: RA = 6.2222 DEC = -81.1234 THE EQUINOX FOR THESE POSITIONS IS 1950.0 A C version of the program for those who have not access to a f77 compiler is also available.