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Messier Index/M103
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
NGC 581 250px J2000.0 d 01h 33.2m +60° 42′ 8.5 kly 7.4 6.0' - - M103
Messier 103 (also known as M103, or NGC 581) is an w:open cluster in the w:constellation Cassiopeia. It was discovered by w:Pierre Méchain in w:1781March 2007. M103 is at a distance of about 8,000 w:light-years from w:Earth.
External links
Open Cluster M103 @ SEDS Messier pages
Open Cluster M103 @ Skyhound.com