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Almanac > Constellations

Triangulum

Triangulum is one of the 88 recognized constellations. It is best seen in December between latitudes +90° and -60°.
 

 



Triangulum

 
 
Fact Sheet

Genitive

  Trianguli

Abbreviation

  Tri

Brightness

  9.1

Location

  2 h (Right Ascension)

  +30° (Declination)

Area

  132 square degrees

Number of Visible Stars

  12

Notable Stars

  Mothallah

Alpha Star

  Ras al Muthallath

Brightest Star

  d Tri (35.4 ly)

Best Seen

  +90° and -60° (Best Latitudes)

  December (Best Month)

 
Description

Overview:
Triangulum (pronouced try ang' yoo lum) is the 78th most volumous constellation in the night sky with an area of 132 square degrees. The name of this constellation means Triangle.

Location:
Triangulum is located at Right Ascension 2 h and Declination +30°. It is best seen between the latitudes +90° and -60° in the month of December. Triangulum is adjacent to the following constellations: Andromeda, Aries, Perseus, Pisces.

Stars:
Triangulum contains within its borders about 12 visible stars. The principal star of Triangulum is Ras al Muthallath. The brightest of Triangulum's stars is d Tri (35.4 ly). This constellation also contains within its boundries the following notable stars: Mothallah.

Visual Magnitude:
Triangulum is the 64th brightest constellation with a brightness of 9.1.