M 18By astrored / November 6, 2023 M17 . . Index . . M19 Messier 18 M 18 (NGC 6613) Open Cluster in Sagittarius. RA=18 19.9, Dec=-17 08. 7.5 mag, dist=4.9 kly. M18 page; DSSM page Hartmut Frommert ([email protected]) Christine Kronberg ([email protected]) Last Modification: 7 Apr 1998, 22:14 MET