47Triangulum, The Triangle

NAME: Triangulum (try-ANG-you-lum)

SEASON: Autumn

CULMINATION: midnight, 23 October

ABBREVIATION: Tri

GENITIVE: Trianguli (try-ANG-you-lee)

NEIGHBORS: And, Ari, Per, Psc

BINOCULAR OBJECTS: NGC 0598 (M 33)

URBAN OBJECTS: none

Triangulum is a small, faint mid-northerly constellation that ranks 78th in size among the 88 constellations. Triangulum covers only 132 square degrees of the celestial sphere, or about 0.3%. Triangulum is devoid of bright stars. It has only two third-magnitude stars, one of the fourth magnitude, and seven of the fifth magnitude. Despite its lack of bright stars, however, Triangulum is reasonably prominent because its triangular shape lies far from any bright stars. Triangulum is easy to find, ...

Get Illustrated Guide to Astronomical Wonders now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.