English Name: The Triangle
Genitive: Ras al Muthallath
Hemisphere: Northern Hemisphere
Location: Between the constellations of Aries and Andromeda.
Visible between latitudes: +90 and -50 degrees
Best season: Autumn/Winter
Seen in three seasons: Autumn, Winter and Spring
Best seen in: Late October / Early December
Seen between: October and December
Right Ascension (RA): 02 hour
Declination (DEC): +30 degrees
Area (square degrees): 132 (78th)
Triangulum (The Triangle)
- Small, but easily found constellation between Andromeda and Aries.
- The famous galaxy – `The Triangulum Galaxy` at magnitude +5.8, it is bright enough to be seen by the naked eye under the darkest skies, but under light-polluted skies, it is challenging or invisible even in a small telescope or binoculars.
- M33 – Spiral Galaxy; also known as `The Pinwheel Galaxy` or `The Triangulum Galaxy`, face-on with a low surface brightness, making it far more difficult to see than M31 (Andromeda Galaxy) in the constellation of Andromeda. It is best observed in binoculars and a larger telescopes from 8-inch or more, are required to detect NGC 604 – Emission Nebula (See below for more NGC 604’s details.)
Features of Interest
- NGC 604 – Emission Nebula; one of the largest known seething of star birth in M33, The Pinwheel Galaxy.
- Alpha Tri (Ras al Muthallath)
- Photo of the constellation; Triangulum, as it appears to the naked eye. (Lines have been added for clarity.)
- Sky Chart – Triangulum
- List of stars in Triangulum.
Back to The 88 Constellations Lists page.