M 100By astrored / November 6, 2023 M99 . . Index . . M101 Messier 100 M 100 (NGC 4321) Spiral Galaxy in Coma Berenices. RA=12 22.9, Dec=+15 49. 9.3 mag, dist=60000 kly. M100 page; DSSM page Hartmut Frommert ([email protected]) Christine Kronberg ([email protected]) Last Modification: 7 Apr 1998, 22:15 MET