features of interest

the set SQUARE

GAMMA-2 (y 2) normae 2 The constellation's brightest star, magnitude 4.0. It is one half of a naked-eye double with 5th-magnitude Gamma-1 (y ') Normae. The two stars lie at widely different distances and thus are unrelated.

EpsIloN (s) normae 5 An easy double of 5th and 7th magnitudes for small telescopes.

ioTA-1 (i1) normae 5 An easy double with components of 5th and 8th magnitudes for small telescopes. Iota-2 (i2) Normae is an unrelated star, some distance away.

NGC 6087 K A large open cluster with radiating chains of stars, visible through binoculars. Its brightest star, near its center, is S Normae, a Cepheid variable that ranges from 6th to 7th magnitudes every 9.8 days.

the set SQUARE

Triangulum Australe Trianguli Australis (TrA)

width m depth m size ranking 83rd fully visible 19°n-90°s

Triangulum Australe is one of the southern constellations introduced in the late 16th century by the Dutch navigators Pieter Dirkszoon Keyser and Frederick de Houtman. It lies in the Milky Way not far from Alpha (a) Centauri. Although smaller than the northern triangle, Triangulum, its stars are brighter and so it is more prominent. Alpha (a) Trianguli Australis is magnitude 1.9, Beta (b) is 2.8, and Delta (S) is 2.9 There is little in this constellation to attract users of small telescopes.


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