Asteria — interactive night sky map
Messier 109 is a galaxy in the constellation Ursa Major with an apparent magnitude of 9.9, spanning about 8 arcminutes. A telescope is needed to observe it.
It is best placed in the evening sky around March. It is visible from the whole northern hemisphere and from southern latitudes down to about 37°S. It is circumpolar (never sets) north of latitude 37°N.