12 Trianguli
12 Trianguli is a solitary star located in the northern constellation Triangulum, with an apparent magnitude of 5.37, making it faintly visible to the naked eye under ideal conditions. The star is situated 160 light years away but is approaching with a heliocentric radial velocity of −24.8 km/s. It is calculated to be about 2.19 Gyr old with a stellar classification of F0 III, making it an F-type giant. It has 1.6 times the mass of the Sun and shines at 14 times the luminosity of the Sun from its photosphere at an effective temperature of 7,199 K.
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Triangulum |
| Right ascension | 02h 28m 09.980s |
| Declination | +29° 40′ 09.59″ |
| Apparent magnitude (V) | 5.37 |
| Characteristics | |
| Spectral type | F0 III |
| B−V color index | +0.29 |
| Astrometry | |
| Radial velocity (Rv) | −24.8±2.8 km/s |
| Proper motion (μ) | RA: −15.632 mas/yr Dec.: −86.097 mas/yr |
| Parallax (π) | 20.4105 ± 0.0942 mas |
| Distance | 159.8 ± 0.7 ly (49.0 ± 0.2 pc) |
| Details | |
| Mass | 1.6 M☉ |
| Luminosity | 14 L☉ |
| Surface gravity (log g) | 3.79 cgs |
| Temperature | 7,199 K |
| Metallicity [Fe/H] | 0.27 dex |
| Rotational velocity (v sin i) | 85 km/s |
| Age | 2.19 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Together with ι Trianguli and 10 Trianguli, it forms part of the obsolete Triangulum Minus.
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