Constellation Triangulum Australe (Southern Triangle)

Triangulum Australe
Triangulum Australe: IAU Constellation Map [150]

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
Season (47° N)Not visible
Right Ascension14h 56m 01s … 17h 13m 53s
Declination-70° 30' 42" … -60° 15' 52"
Area110 deg2
Neighbours (N↻)Nor, Cir, Aps, Ara

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]

Catalogs

Yale Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991) [154]
HR B F RA [hms] Dec [dms] vMag spType dMag Sep ["]
5671γ15 18 54.6-68 40 462.89 A1V
5771ε15 36 43.2-66 19 014.11 K1-2III 5.483.2
5891κ15 55 29.6-68 36 115.09 G5IIa
5897β15 55 08.5-63 25 502.85 F2III 11.0155.
6030δ16 15 26.3-63 41 083.85 G2Ib-IIa 8.030.
6098ζ16 28 28.1-70 05 044.91 F9V
6109ι16 27 57.3-64 03 295.27 F4IV 4.119.6
6151θ16 35 44.8-65 29 435.52 G8-K0III
6172η116 41 23.3-68 17 465.91 B7IVe
6217α16 48 39.9-69 01 401.92 K2IIb-IIIa

Revised+Historic NGC/IC, Version 22/9, © Dr. Wolfgang Steinicke [277]
Planetary Nebulae
NameRADecTypebMagvMagDimDreyer DescriptionIdentification, Remarks
NGC 584415 10 40.7-64 40 22PN13.21.22pB, pL, R, vgvlbMPK 317-5.1, ESO 99-PN1, AM 1506-642
NGC 597915 47 41.1-61 13 02PN11.811.50.3!, planetary, pF, vS, R, r? am 150 stPK 322-5.1, ESO 136-PN3, CS=13.1
Open Clusters
NameRADecTypebMagvMagDimDreyer DescriptionIdentification, Remarks
NGC 602516 03 17.7-60 25 53II2p5.115Cl, B, vL, pRi, lC, st 7…OCL 939, ESO 136-SC14
Galaxies
NameRADecTypebMagvMagDimDreyer DescriptionIdentification, Remarks
NGC 593815 36 26.1-66 51 33SBbc12.411.82.8 × 2.5F, S, am stESO 99-7, AM 1531-664, IRAS 15317-6641
NGC 615616 34 52.6-60 37 09SBc12.211.51.6 × 1.4pF, pL, vlE, gbMESO 137-33, FAIR 329, IRAS 16304-6030
NGC 618316 41 41.8-69 22 21Sa13.112.21.8 × 0.6vF, eS, R, gbMESO 69-8
IC 457115 48 51.6-67 19 25SBb13.412.61.4 × 0.5cF, cS, mE 155°ESO 99-11, IRAS 15440-6710
IC 458416 00 12.5-66 22 57Sc15.815.11.8 × 1.5eF, S, iFESO 100-4, AM 1555-661, IRAS 15554-6614
IC 458516 00 17.1-66 19 21SBb13.012.32.6 × 0.8eF, S, iFESO 100-5, AM 1555-661, IRAS 15555-6610
IC 459516 20 43.8-70 08 33Sc12.712.02.7 × 0.5F, S, eE 55°ESO 69-2, IRAS 16153-7001

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
150IAU: The Constellations, 11. Oktober 2020; iau.org/public/themes/constellations
154Yale Bright Star Catalog, 15. Oktober 2020; tdc-www.harvard.edu/catalogs/bsc5.html
277«Historische Deep-Sky Kataloge» von Dr. Wolfgang Steinicke; klima-luft.de/steinicke (2021-02-17)