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HD 133683 is a single[8] star in the southern constellation of Triangulum Australe. It has a yellow-white hue and is dimly visible to the naked eye with an apparent visual magnitude of +5.76.[2] The distance to this star is approximately 3,600 light-years based on parallax, but it is drifting closer with a radial velocity of −14.7 km/s.[1]
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Triangulum Australe |
| Right ascension | 15h 09m 29.91331s[1] |
| Declination | −67° 05′ 02.8878″[1] |
| Apparent magnitude (V) | +5.76[2] |
| Characteristics | |
| Spectral type | F5Ib[3] |
| B−V color index | 0.675±0.017[2] |
| Astrometry | |
| Radial velocity (Rv) | −14.72±0.14[1] km/s |
| Proper motion (μ) | RA: −3.146[1] mas/yr Dec.: −3.314[1] mas/yr |
| Parallax (π) | 0.9159 ± 0.0583 mas[1] |
| Distance | 3,600 ± 200 ly (1,090 ± 70 pc) |
| Details | |
| Mass | 11.59±1.12[4] M☉ |
| Radius | 79.3+1.9 −6.2[1] R☉ |
| Luminosity | 5,436±458[1] L☉ |
| Surface gravity (log g) | 1.70[5] cgs |
| Temperature | 5,567+231 −64[1] K |
| Metallicity [Fe/H] | 0.00[5] dex |
| Rotational velocity (v sin i) | 4.7±0.2[6] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
This is a massive supergiant star with a stellar classification of F5Ib.[3] It has around 11[4] times the mass of the Sun and is spinning with a projected rotational velocity of 4.7 km/s.[6] The star has expanded to 79[1] times the radius of the Sun. It is radiating 5,400[1] times the luminosity of the Sun from its photosphere at an effective temperature of 5,567 K.[1]
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