Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Triangulum |
Right ascension | 02h 32m 06.16977s[1] |
Declination | +36° 08′ 50.1813″[1] |
Apparent magnitude (V) | 5.14±0.01[2] |
Characteristics | |
Spectral type | K5 III[3] |
U−B color index | +1.78[4] |
B−V color index | +1.47[4] |
Astrometry | |
Radial velocity (Rv) | −36.8±0.3[5] km/s |
Proper motion (μ) | RA: +45.066 mas/yr[1] Dec.: +11.901 mas/yr[1] |
Parallax (π) | 7.5319 ± 0.1060 mas[1] |
Distance | 433 ± 6 ly (133 ± 2 pc) |
Absolute magnitude (MV) | −0.46[6] |
Orbit[7] | |
Primary | 14 Tri A |
Companion | 14 Tri B |
Period (P) | 6,257±73 d |
Eccentricity (e) | 0.22±0.04 |
Periastron epoch (T) | 2,448,284±166 JD |
Argument of periastron (ω) (secondary) | 40±11° |
Semi-amplitude (K1) (primary) | 2.27±0.09 km/s |
Details | |
Mass | 1.85±0.09[8] M☉ |
Radius | 40.5±2.1[9] R☉ |
Luminosity | 373±11[10] L☉ |
Surface gravity (log g) | 1.65[11] cgs |
Temperature | 3,957[12] K |
Metallicity [Fe/H] | −0.16[13] dex |
Rotational velocity (v sin i) | 2.1±1.2[14] km/s |
Other designations | |
Database references | |
SIMBAD | data |
14 Trianguli (14 Tri), also known as HD 15656, is a spectroscopic binary[16] located in the northern constellation Triangulum. It has an apparent magnitude of 5.14,[2] making it faintly visible to the naked eye in ideal conditions. Gaia DR3 parallax measurements place the system 433 light years away,[1] and it is currently approaching the Solar System with a heliocentric radial velocity of −37 km/s.[5] At its current distance, 14 Tri's brightness is diminished by 0.21 magnitude due to interstellar dust.[17] It has an absolute magnitude of −0.46.[6]
The visible component is an evolved red giant with a stellar classification of K5 III. It has 1.85 times the mass of the Sun,[8] but it has expanded to 40.5 times its girth.[9] It radiates 373 times the luminosity of the Sun[10] from its photosphere at an effective temperature of 3,957 K,[12] giving it an orangish-red hue. 14 Tri is slightly metal-deficient with [Fe/H] = −0.16,[13] and spins modestly with a projected rotational velocity of 2.1 km/s.[14] This is a single-lined spectroscopic binary that completes an eccentric orbit within 17 years. The secondary star has not been detected visually or in the spectrum and is expected to be a low-mass red dwarf or white dwarf.[7] 14 Tri may be part of the Wolf 630 moving group.[18]