The Triangulum Australe constellation

Why this name?

Three prominent stars form an almost equilateral triangle. The word ‘southern’ distinguishes the figure from the ancient Triangulum in the northern sky.

A little history

European seafarers noted it in the sixteenth century. The constellation became established on globes at the end of that century and in Bayer’s atlas of 1603.

Data

IAU code

TrA

Catalogue stars

6

Messier objects

0

Brightest star

Atria · 1.9ᵐ

Stars

• Atriastar · 1.9ᵐ

Stars (HIP)

• HIP 77952 · 2.8ᵐ · F2III
• HIP 74946 · 2.9ᵐ · A1V
• HIP 79664 · 3.9ᵐ · G5II
• HIP 76440 · 4.1ᵐ · K0III
• HIP 80686 · 4.9ᵐ · F9V

Altitude above the horizon by latitude

Geometric altitude at upper culmination, atmospheric refraction not included. Positive latitudes are in the northern hemisphere.

Culmination time by month

Upper culmination in local solar time — no time-zone or daylight-saving correction applied.

Neighbouring constellations

• ApusAps
• AraAra
• CircinusCir
• NormaNor

In brief

Sources on constellation history

• Triangulum Australe: name and history
• Constellation names and origins — Harvard–Smithsonian Center for Astrophysics Library