This is the list of notable stars in the constellation Triangulum Australe, sorted by decreasing brightness.
Name | B | Var | HD | HIP | RA | Dec | vis. mag. | abs. mag. | Dist. (ly) | Sp. class | Notes | ||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
α TrA | α | 150798 | 82273 | 16h 48m 39.87s | −69° 01′ 39.5″ | 1.91 | −3.62 | 391 | K2IIb-IIIa | Atria, possible binary star [1] | |||||
β TrA | β | 141891 | 77952 | 15h 55m 08.81s | −63° 25′ 47.1″ | 2.83 | 2.38 | 40 | F1 V [2] | ||||||
γ TrA | γ | 135382 | 74946 | 15h 18m 54.69s | −68° 40′ 46.1″ | 2.87 | −0.87 | 183 | A1V | ||||||
δ TrA | δ | 145544 | 79664 | 16h 15m 26.27s | −63° 41′ 08.3″ | 3.86 | −2.54 | 621 | G5II | ||||||
ε TrA | ε | 138538 | 76440 | 15h 36m 43.19s | −66° 19′ 00.9″ | 4.11 | 0.00 | 216 | K0III | ||||||
ζ TrA | ζ | 147584 | 80686 | 16h 28m 27.80s | −70° 05′ 04.8″ | 4.90 | 4.49 | 39 | F9V | ||||||
LP TrA | LP | 150549 | 82129 | 16h 46m 40.01s | −67° 06′ 34.8″ | 5.10 | −1.32 | 626 | A0II-IIIp | α² CVn variable, ΔV = 0.033m, P = 3.76 d | |||||
κ TrA | κ | 141767 | 77982 | 15h 55m 29.61s | −68° 36′ 10.8″ | 5.11 | −4.70 | 2991 | G6IIa | semiregular variable, Vmax = 5.08m, Vmin = 5.11m, P = 600 d | |||||
HD 148291 | 148291 | 80874 | 16h 30m 49.37s | −61° 38′ 00.5″ | 5.19 | −1.37 | 669 | K0II/IIICN. | |||||||
ι TrA | ι | 147787 | 80645 | 16h 27m 57.27s | −64° 03′ 28.8″ | 5.28 | 2.25 | 132 | F4IV | γ Dor variable, triple star | |||||
θ TrA | θ | 148890 | 81252 | 16h 35m 44.77s | −65° 29′ 43.2″ | 5.50 | 0.49 | 328 | G8/K0III | ||||||
HD 140483 | 140483 | 77390 | 15h 47m 53.10s | −65° 26′ 31.9″ | 5.54 | 0.06 | 406 | A5 | |||||||
LX TrA | LX | 137066 | 75665 | 15h 27m 33.10s | −64° 31′ 53.2″ | 5.71 | −0.88 | 679 | K5/M0III | semiregular variable | |||||
HD 142514 | 142514 | 78279 | 15h 58m 58.16s | −65° 02′ 15.2″ | 5.74 | −1.08 | 753 | B7III | |||||||
X TrA | X | 134453 | 74582 | 15h 14m 19.17s | −70° 04′ 46.0″ | 5.75 | −2.56 | 1495 | C5.5 [3] | semiregular variable, Vmax = 5.03m, Vmin = 6.05m, P = 361.1 d | |||||
HD 133683 | 133683 | 74184 | 15h 09m 29.92s | −67° 05′ 02.9″ | 5.76 | −5.58 | 6037 | F8Iab-Ib | |||||||
HD 142139 | 142139 | 78045 | 15h 56m 05.96s | −60° 28′ 56.3″ | 5.76 | 1.66 | 215 | A3V | |||||||
MX TrA | MX | 152564 | 83150 | 16h 59m 33.98s | −69° 16′ 05.3″ | 5.79 | −1.60 | 982 | Ap Si | α² CVn variable | |||||
HD 136672 | 136672 | 75565 | 15h 26m 14.53s | −68° 18′ 33.1″ | 5.89 | 0.84 | 334 | K0III | |||||||
η1 TrA | η1 | 149671 | 81710 | 16h 41m 23.13s | −68° 17′ 45.9″ | 5.89 | −0.73 | 688 | B7IV | ||||||
HD 145689 | 145689 | 79797 | 16h 17m 05.48s | −67° 56′ 27.9″ | 5.95 | 2.24 | 180 | A4V | suspected variable | ||||||
HD 150026 | 150026 | 81873 | 16h 43m 22.11s | −67° 25′ 56.3″ | 6.02 | 1.17 | 305 | A0Vn | suspected variable | ||||||
HD 151441 | 151441 | 82517 | 16h 51m 53.88s | −65° 22′ 31.5″ | 6.12 | −1.20 | 948 | B8II/III | |||||||
HD 141913 | 141913 | 77927 | 15h 54m 52.64s | −60° 44′ 37.1″ | 6.14 | −2.45 | 1707 | B9II | suspected variable, Vmax = 6.11m, Vmin = 6.15m | ||||||
HD 147349 | 147349 | 80455 | 16h 25m 22.15s | −63° 07′ 30.9″ | 6.14 | 0.55 | 428 | A1V | |||||||
HD 133456 | 133456 | 74047 | 15h 07m 56.75s | −65° 16′ 31.6″ | 6.18 | −0.75 | 793 | K3III | 34 G. Cir | ||||||
HD 141585 | 141585 | 77817 | 15h 53m 22.94s | −62° 36′ 23.6″ | 6.22 | −0.19 | 623 | K3III | suspected variable, Vmax = 6.18m, Vmin = 6.21m | ||||||
HD 150097 | 150097 | 81823 | 16h 42m 48.42s | −62° 33′ 14.1″ | 6.23 | −2.04 | 1468 | K3III | |||||||
HD 143238 | 143238 | 78603 | 16h 02m 52.53s | −62° 32′ 29.5″ | 6.25 | 1.17 | 339 | B9.5V | |||||||
HD 135737 | 135737 | 75091 | 15h 20m 40.56s | −67° 28′ 53.4″ | 6.27 | −1.66 | 1254 | B3V | suspected variable | ||||||
HD 151404 | 151404 | 82539 | 16h 52m 17.78s | −67° 40′ 53.4″ | 6.33 | 1.01 | 377 | K2III | |||||||
R TrA | R | 135592 | 75018 | 15h 19m 45.71s | −66° 29′ 45.7″ | 6.39 | 3500 | F7Ib/II | Cepheid variable, Vmax = 6.33m, Vmin = 7m, P = 3.389287 d | ||||||
S TrA | S | 142941 | 78476 | 16h 01m 10.72s | −63° 46′ 35.5″ | 6.42 | −2.57 | 2050 | F8II | Cepheid variable, Vmax = 5.95m, Vmin = 6.81m, P = 6.32344 d | |||||
HD 138965 | 138965 | 76736 | 15h 40m 11.63s | −70° 13′ 39.9″ | 6.45 | 2.01 | 252 | A5V | |||||||
HD 153389 | 153389 | 83556 | 17h 04m 33.70s | −68° 16′ 43.1″ | 6.47 | −1.46 | 1254 | M3/M4III | suspected irregular variable | ||||||
HD 144481 | 144481 | 79208 | 16h 09m 59.19s | −62° 58′ 01.2″ | 6.50 | 1.41 | 340 | A3m... | |||||||
U TrA | U | 143999 | 78978 | 16h 07m 09.01s | −62° 54′ 38.0″ | 7.89 | 3130 | F8Ib/II | Cepheid variable, Vmax = 7.3m, Vmin = 8.29m, P = 2.568423 d | ||||||
HD 147018 | 147018 | 80250 | 16h 23m 00.15s | −61° 41′ 19.5″ | 8.37 | 5.22 | 139 | G9V | has two planets (b & c) | ||||||
RT TrA | RT | 81157 | 16h 34m 30.89s | −63° 08′ 00.8″ | 9.70 | 2590 | G2Ib-II: | W Virginis variable, Vmax = 9.43m, Vmin = 10.18m, P = 1.9461124 d | |||||||
WR 71 | LT | 143414 | 78689 | 16h 03m 49.34s | −62° 41′ 36.0″ | 10.10 | 2940 | WN6w | Wolf–Rayet star, ΔV = 0.13m | ||||||
EK TrA | EK | 15h 14m 01.47s | −65° 05′ 32.1″ | 10.40 | SU Ursae Majoris variable, Vmax = 10.4m, Vmin = <15.0m, P = 0.06288 d | ||||||||||
HD 141969 | MM | 141969 | 78034 | 15h 56m 01.69s | −66° 09′ 09.2″ | 11.00 | 3500 | BC0Ibe | central star of planetary nebula He 2-138 | ||||||
KX TrA | KX | 16h 44m 35.47s | −62° 37′ 14.08″ | 11.38 | M6 | Z Andromedae variable | |||||||||
4U 1626-67 | KZ | 16h 32m 16.8s | −67° 27′ 43″ | 18.50 | Low-mass X-ray binary, Vmax = 18.23m, Vmin = 19m | ||||||||||
X1556-605 | LU | 16h 01m 02.3s | −60° 44′ 18″ | 18.60 | Low-mass X-ray binary, Vmax = 18.6m, Vmin = 19.2m, P = 0.46229 d | ||||||||||
TrA X-1 | KY | 15h 28m 17.2s | −61° 52′ 58″ | Low-mass X-ray binary | |||||||||||
WISE 1639-6847 | 16h 39m 40.83s | −68° 47′ 38.6″ | 16 | Y | brown dwarf | ||||||||||
Table legend:
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HD 63454, formally named Ceibo, is a star located in the southern circumpolar constellation Chamaeleon near the border with Mensa. To see the star, one needs a small telescope because it has an apparent magnitude of 9.36, which is below the limit for naked eye visibility. The object is located relatively close at a distance of 123 light years based on Gaia DR3 parallax measurements but is receding with a heliocentric radial velocity of 33.8 km/s. At its current distance, HD 63454's brightness is diminished by two tenths of a magnitude due to interstellar dust. It has an absolute magnitude of +6.68.
HD 20782 is the primary of a wide binary system located in the southern constellation Fornax. It has an apparent magnitude of 7.38, making it readily visible in binoculars but not to the naked eye. The system is located relatively close at a distance of 117 light-years based on Gaia DR3 parallax measurements, but it is receding with a heliocentric radial velocity of 40.7 km/s. At its current distance, HD 20782's brightness is diminished by 0.12 magnitudes due to interstellar extinction and it has an absolute magnitude of +4.61.
Alpha Cygni variables are variable stars which exhibit non-radial pulsations, meaning that some portions of the stellar surface are contracting at the same time other parts expand. They are supergiant stars of spectral types B or A. Variations in brightness on the order of 0.1 magnitudes are associated with the pulsations, which often seem irregular, due to beating of multiple pulsation periods. The pulsations typically have periods of several days to several weeks.
DL Crucis is a variable star in the constellation Crux.
HD 88218 is a binary star in the southern constellation Antlia. The system has a combined apparent magnitude of 6.14, making it faintly visible to the naked eye. HD 88218 is relatively close at a distance of 103 light years but is receding with a heliocentric radial velocity of 36.7 km/s.
HD 27274, also known as Gliese 167, is a solitary, orange hued star located in the southern constellation Dorado. It has an apparent magnitude of 7.63, making it readily visible in binoculars, but not to the naked eye. Based on parallax measurements from the Gaia spacecraft, the star is known to be located 42.5 light-years away from the Solar System However, it is drifting closer with a heliocentric radial velocity of −23 km/s. At its current distance, HD 27274 is dimmed down by 0.05 magnitudes due to interstellar dust.
Rho Puppis, formally named Tureis, is a star in the southern constellation of Puppis. With an average apparent visual magnitude of 2.78, it is the third-brightest member of this generally faint constellation. Based upon parallax measurements made during the Hipparcos mission, Rho Puppis is located at a distance of 63.5 light-years from the Sun. It is the prototype of the ρ Puppis class of evolved Am stars.
N Scorpii, also known as HD 148703, is a solitary, bluish-white hued star located in the southern constellation Scorpius. It has an apparent magnitude of 4.23, making it readily visible to the naked eye. N Scorpii was initially given the Bayer designation Alpha Normae by Lacaille but it was later moved from Norma to Scorpius. N Scorpii is currently located 550 light years away based on parallax measurements from the Hipparcos satellite and is part of the Upper Scorpius–Centaurus region of the Scorpius–Centaurus association.
HD 143346 is a single star in the southern circumpolar constellation of Apus. It is 28.5 minutes west and about 5° north of the yellow giant star Gamma Apodis, which is the second brightest star in the constellation of Apus.
HD 39194 is a star located in the southern circumpolar constellation Mensa. It has an apparent magnitude of 8.07, making it readily visible in binoculars but not to the naked eye. The object is relatively close at a distance of 86 light years but is receding with a heliocentric radial velocity of 13.9 km/s.
Xi Octantis, Latinized from ξ Octantis, is a solitary variable star in the southern circumpolar constellation Octans. It has an apparent magnitude of about 5.3, allowing it to be faintly seen with the naked eye; however, this varies slightly. Located 514 light years away, the object is receding with a heliocentric radial velocity of 22 km/s.
YY Mensae, also known as HD 32918, is a variable star located in the southern circumpolar constellation Mensa. It has an apparent magnitude that fluctuates between 8.6 and 8.9, which is within the visibility of binoculars. Based on parallax measurements from Gaia DR3, it is estimated to be 715 light years distant. It appears to be approaching the Solar System with a heliocentric radial velocity of −8.5 km/s.
HD 44506 is a solitary, blue hued star located in the southern constellation Columba. The object is also called HR 2288, which is its Bright Star Catalog designation. It has an average apparent magnitude of 5.52, making it faintly visible to the naked eye under ideal conditions. HD 44506 is located relatively far at a distance of 1,800 light years based on Gaia DR3 parallax measurements but is receding with a heliocentric radial velocity of 54 km/s.
HD 201772, also known as HR 8104, is a yellowish-white hued star located in the southern constellation Microscopium. It has an apparent magnitude of 5.26, making it one of the brighter members of this generally faint constellation. The object is located relatively close at a distance of 111 light-years based on Gaia DR3 parallax measurements but is approaching closer with a heliocentric radial velocity of −41 km/s. At its current distance, HD 201772's brightness is diminished by 0.11 magnitudes due to interstellar dust.