M 6By astrored / November 6, 2023 M5 . . Index . . M7 Messier 6 M 6 (NGC 6405) Open Cluster in Scorpius. Butterfly Cluster RA=17 40.1, Dec=-32 13. 5.3 mag, dist=2 kly. M6 page; DSSM page Hartmut Frommert ([email protected]) Christine Kronberg ([email protected]) Last Modification: 7 Apr 1998, 22:14 MET