Asteria — interactive night sky map
Messier 55 is a globular cluster in the constellation Sagittarius with an apparent magnitude of 6.5, spanning about 12 arcminutes. It is within reach of binoculars or a small telescope.
It is best placed in the evening sky around July. It is visible from the whole southern hemisphere and from northern latitudes up to about 59°N. It is circumpolar (never sets) south of latitude 59°S.