Location of 11 Trianguli (circled) | |
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Triangulum |
Right ascension | 02h27m 27.771s[1] |
Declination | +31° 48′ 04.61″[1] |
Apparent magnitude (V) | 5.55[2] |
Characteristics | |
Evolutionary stage | horizontal branch[3] |
Spectral type | K1 III[4][5] |
B−V color index | +1.1[2] |
Astrometry | |
Radial velocity (Rv) | −41.614±0.163[6] km/s |
Proper motion (μ) | RA: −24.331[1] mas/yr Dec.: −27.845[1] mas/yr |
Parallax (π) | 11.6240 ± 0.1293 mas[1] |
Distance | 281 ± 3 ly (86.0 ± 1.0 pc) |
Absolute magnitude (MV) | 0.836[7] |
Details | |
Mass | 2.446±0.122[8] M☉ |
Radius | 12.055±0.603[8] R☉ |
Luminosity | 54.6±3.8[9] L☉ |
Surface gravity (log g) | 2.2[10] cgs |
Temperature | 4,572[10] K |
Metallicity [Fe/H] | −0.19[7][11] dex |
Age | 6.3+2.8 −1.4[3] Gyr |
Other designations | |
11 Trianguli, AG+31° 231, BD+31°427, GC 2943, HD 15176, HIP 11432, HR 712, SAO 55570 | |
Database references | |
SIMBAD | data |
11 Trianguli is a solitary[12] star located in the northern constellation Triangulum, with an apparent magnitude of 5.55. The star is situated 281 light years[1] away but is approaching with a heliocentric radial velocityof−41.614 km/s.[6] It is probably on the horizontal branch fusing helium in its core,[3] and is calculated to be about 6.3 Gyr old.[3] It has a stellar classification of K1 III.[4][5] It has 2.446 times the mass of the Sun and 12.055 times the radius of the Sun.[8] It shines at 54.6 times the luminosity of the Sun[9] from its photosphere at an effective temperatureof4,572 K.[10]