10 Trianguli (HD 14252; HR 675; 1 H. Trianguli Minus), or simply 10 Tri is a solitary star[17] located in the northern constellation Triangulum. It is faintly visible to the naked eye as a white-hued point of light with an apparent magnitude of 5.29.[2] Gaia DR3 parallax measurements imply a distance of 363 light-years [1] and it is slowly receding with a heliocentric radial velocity of 0.4 km/s.[7] At its current distance, 10 Tri's brightness is diminished by an interstellar extinction of 0.11 magnitudes[18] and it has an absolute magnitude of −0.02.[8]
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Triangulum |
Right ascension | 02h 18m 56.99355s[1] |
Declination | +28° 38′ 33.6322″[1] |
Apparent magnitude (V) | 5.29±0.01[2] |
Characteristics | |
Evolutionary stage | main sequence star[3] |
Spectral type | A2 V[4][5] |
U−B color index | +0.02[6] |
B−V color index | +0.04[6] |
Astrometry | |
Radial velocity (Rv) | 0.4±0.1[7] km/s |
Proper motion (μ) | RA: +7.073 mas/yr[1] Dec.: +0.836 mas/yr[1] |
Parallax (π) | 8.9971 ± 0.0729 mas[1] |
Distance | 363 ± 3 ly (111.1 ± 0.9 pc) |
Absolute magnitude (MV) | −0.02[8] |
Details | |
Mass | 2.83±0.05[3] M☉ |
Radius | 3.71±0.19[9] R☉ |
Luminosity | 108+10 −9[3] L☉ |
Surface gravity (log g) | 3.73[10] cgs |
Temperature | 9,023[11] K |
Metallicity [Fe/H] | +0.33[12] dex |
Rotational velocity (v sin i) | 22±2[13] km/s |
Age | 372±44[14][15] Myr |
Other designations | |
Database references | |
SIMBAD | data |
10 Trianguli has a stellar classification of A2 V,[4][5] indicating that it is an ordinary A-type main-sequence star that is generating energy via hydrogen fusion at its core. It has 2.83 times the mass of the Sun[3] and a slightly enlarged radius 3.71 times that of the Sun.[9] It radiates 108 times the luminosity of the Sun[3] from its photosphere at an effective temperature of 9,023 K.[11] 10 Trianguli is rather evolved for its class, having completed 92.5% of its main sequence lifetime[3] at the age of 372 million years.[14][15] It is metal enriched with an iron abundance of [Fe/H] = +0.33 or % of the Sun's[12] and unlike most hot stars, it spins modestly with a projected rotational velocity of 22 km/s.[13]
10 Trianguli has a 13th magnitude companion located 58.3" away along a position angle of 205°.[19] It is an unrelated background star that is much more distant than 10 Trianguli.[20] Together with ι Trianguli and 12 Trianguli, it forms part of the obsolete Triangulum Minus.