Finding the constellation which contains given sky coordinates

Enter coordinates below, in the equinox 2000.0 coordinate system. Right ascension should be entered first, followed by declination. Right ascension can be in the form HH MM SS.SSS, HH MM.MMM, or HH.HHH. Declination can be in the form ±DD MM SS.SSS, ±DD MM.MMM, or ±DD.DDD. Examples:
20 34 55.56 -10 33 22.1
7 18.389 +41 32.17
13.2324 +33.91


For the constellation boundaries used, see catalog VI/42 at the CDS (Strasbourg Astronomical Data Center.) The computation is performed in your browser by a Javascript program.

Last significant update 2-VIII-2008