M 23By astrored / November 6, 2023 M22 . . Index . . M24 Messier 23 M 23 (NGC 6494) Open Cluster in Sagittarius. RA=17 56.8, Dec=-19 01. 6.9 mag, dist=2.15 kly. M23 page; DSSM page Hartmut Frommert ([email protected]) Christine Kronberg ([email protected]) Last Modification: 7 Apr 1998, 22:14 MET