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Variable star in the constellation Triangulum Australe From Wikipedia, the free encyclopedia
Kappa Trianguli Australis (κ Trianguli Australis) is a star in the constellation Triangulum Australe.
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Triangulum Australe |
Right ascension | 15h 55m 29.59831s[1] |
Declination | −68° 36′ 10.8101″[1] |
Apparent magnitude (V) | +5.08[2] |
Characteristics | |
Spectral type | G3/5 Ib[3] |
B−V color index | +1.12[2] |
Variable type | suspected SRD[4] |
Astrometry | |
Radial velocity (Rv) | +3.9±0.3[5] km/s |
Proper motion (μ) | RA: −9.36[1] mas/yr Dec.: −6.79[1] mas/yr |
Parallax (π) | 2.70 ± 0.26 mas[1] |
Distance | 1,200 ± 100 ly (370 ± 40 pc) |
Absolute magnitude (MV) | −2.71[6] |
Details | |
Mass | 7.0[7] M☉ |
Luminosity | 1,761[8] L☉ |
Surface gravity (log g) | 1.90[9] cgs |
Temperature | 4,658[10] K |
Metallicity [Fe/H] | +0.21[9] dex |
Rotational velocity (v sin i) | 7.7±1.0[10] km/s |
Age | 55.2[7] Myr |
Other designations | |
Database references | |
SIMBAD | data |
Kappa Trianguli Australis is a yellow G-type supergiant with an apparent magnitude of +5.08. It is around 1,200 light years from Earth.
It is not generally listed as a variable star but Hipparcos photometry showed small amplitude brightness changes. The dominant period was around 600 days and the amplitude less than a hundredth of a magnitude.[13]
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