Constellation Triangulum Australe (Southern Triangle)

Triangulum Australe
Triangulum Australe: IAU Constellation Map [150]

Properties

The constellation is small but noticeable at 110 square degrees, because the equilateral triangle is formed by three stars of the 2nd and 3rd magnitude. It is to the east of the two front cataracts of the Centaurs. The center of the constellation culminates around midnight on May 22nd. [9, 15]

Data for constellation Triangulum Australe [150]
IAU NameTriangulum Australe
IAU GenitiveTrianguli Australis
IAU Abbr.TrA
English NameSouthern Triangle
Opposition22 May
Season (47° N)
Right Ascension14h 56m 01s … 17h 13m 53s
Declination-70° 30' 42" … -60° 15' 52"
Area110 deg2
Neighbours (N↻)Nor, Cir, Aps, Ara

Deep-Sky Object Descriptions

NGC 6025

Catalogues

Southern Constellations: Phoenix, Grus, Indus, Toucan, Hydrus, Pavo, Apus Indica, Triangulum Australe, Chameleon, Apis, Piscis Volans, Dorado
Southern Constellations: Phoenix, Grus, Indus, Toucan, Hydrus, Pavo, Apus Indica, Triangulum Australe, Chameleon, Apis, Piscis Volans, Dorado: Illustration from «Uranometria» by Johann Bayer, copper engraving by Alexander Mair, 1603 [28]

History

The constellation was introduced in 1603 by Johann Bayer as a southern counterpart to the long-known triangulum in his Uranometria. It was proposed by Pieter Theodor a century earlier. [7]

References

  • [7] «Der grosse Kosmos-Himmelsführer» von Ian Ridpath und Wil Tirion; Kosmos Verlag; ISBN 3-440-05787-9
  • [9] «Drehbare Sternkarte SIRIUS» von H. Suter-Haug; Hallwag-Verlag, Bern
  • [15] «Hartung's Astronomical Objects for Southern Telescopes» by David Malin and David J. Frew; Melbourne University Press 1995; ISBN 0-522-84553-3
  • [28] «Uranometria omnium asterismorum continens schemata, nova methodo delineata aereis laminis expressa» Johann Bayer, Augsburg, 1603; DOI:10.3931/e-rara-309
  • [150] IAU: The Constellations, 11. Oktober 2020; iau.org/public/themes/constellations