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The Triangle

Constellation of the northern sky

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Constellation FamilyPerseus
Celestial QuadrantsNQ1
Right Ascension01h31 to 02h50
Declination+25.6° to +37.4°
Area (sq deg)132
Brightest StarBeta Trianguli
Optimum VisibilityNovember
NotesThis group of three stars has been known as the 'Triangle' since classical times. The constellation gives its name to the Triangulum Galaxy, M33, which lies westward of the main triangle formation near the constellation's border with Pisces.
Map of Triangulum Map of Triangulum

A small but distinctive constellation of the northern sky. Perhaps its most notable feature is M33, the Triangulum Galaxy, which is a near neighbour in galactic terms.


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