Messier 55 ( NGC 6809 ) "The Summer Rose Star". on June 14th, 05:50ut. A globular cluster in the constellation Sagittarius. M55 is especially noteworthy for its lack of a strong central concentration, helping to spread out the stars for a very striking appearance without blending many of the central stars into a single blaze.(LX200ACF ,F6.3,CGE mount, ST402me NAB Ccd, Astronomik LRGB filter set.)