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constbnd

Code and data for IAU constellation boundaries

In 1930, the International Astronomical Union (IAU) came up with an official set of 88 constellations, dividing the sky into areas along RA/dec lines. This code takes the dividing lines and emits a C array that simplifies the problem of figuring out which constellation corresponds to a particular RA/dec.

I really only needed this code to run once, to create the array now stored in conbound.c in the lunar repository. So the code is of historical/documentary interest only. The list of boundary data, of course, remains of interest.

constbnd.txt contains further documentation of the history, format, and use of the constellation boundary data.

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