Messier 91

Messier 91 (M91) is a spiral galaxy in the constellation Coma Berenices, with an apparent magnitude of 10.2. It is about 55.9 million light-years away.

Finder chart for Messier 91 in the constellation Coma Berenices
Messier 91 (circled) in Coma Berenices. Pink symbols mark Messier objects.
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Facts

CatalogMessier 91 (M91)
Typespiral galaxy
ConstellationComa Berenices
Apparent magnitude10.2
Distanceabout 55.9 million light-years
Right ascension12 h 35.4 min
Declination+14.50°
Best monthMay (at about 9 pm)

Sources: star positions, magnitudes and colors from the Yale Bright Star Catalogue; constellation boundaries and star names from the IAU; areas and distances from Wikidata; stick figures by M. van der Sluys. How the maps are made.

How to find M91

M91 is in Coma Berenices. From 40° N it is highest in the south in May evenings, about 64° up. From 35° S it reaches about 41° in the north. You need a telescope and a dark sky to see it.

Coma Berenices constellation →

Other Messier objects in Coma Berenices

Messier 53 (M53)Black Eye Galaxy (M64)Messier 85 (M85)Messier 88 (M88)Messier 98 (M98)Messier 99 (M99)Messier 100 (M100)

The Messier catalog →

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