O'Reilly logo

Illustrated Guide to Astronomical Wonders by Barbara Fritchman Thompson, Robert Bruce Thompson

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

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, ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required