11 Trianguli
11 Trianguli is a solitary star located in the northern constellation Triangulum, with an apparent magnitude of 5.55. The star is situated 281 light years away but is approaching with a heliocentric radial velocity of −41.614 km/s. It is probably on the horizontal branch fusing helium in its core, and is calculated to be about 6.3 Gyr old. It has a stellar classification of K1 III. It has 2.446 times the mass of the Sun and 12.055 times the radius of the Sun. It shines at 54.6 times the luminosity of the Sun from its photosphere at an effective temperature of 4,572 K.
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Triangulum |
| Right ascension | 02h 27m 27.771s |
| Declination | +31° 48′ 04.61″ |
| Apparent magnitude (V) | 5.55 |
| Characteristics | |
| Evolutionary stage | horizontal branch |
| Spectral type | K1 III |
| B−V color index | +1.1 |
| Astrometry | |
| Radial velocity (Rv) | −41.614±0.163 km/s |
| Proper motion (μ) | RA: −24.331 mas/yr Dec.: −27.845 mas/yr |
| Parallax (π) | 11.6240 ± 0.1293 mas |
| Distance | 281 ± 3 ly (86.0 ± 1.0 pc) |
| Absolute magnitude (MV) | 0.836 |
| Details | |
| Mass | 2.446±0.122 M☉ |
| Radius | 12.055±0.603 R☉ |
| Luminosity | 54.6±3.8 L☉ |
| Surface gravity (log g) | 2.2 cgs |
| Temperature | 4,572 K |
| Metallicity [Fe/H] | −0.19 dex |
| Age | 6.3+2.8 −1.4 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
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