10 Trianguli

10 Trianguli (HD 14252; HR 675; 1 H. Trianguli Minus), or simply 10 Tri is a solitary star 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. Gaia DR3 parallax measurements imply a distance of 363 light-years and it is slowly receding with a heliocentric radial velocity of $$. At its current distance, 10 Tri's brightness is diminished by an interstellar extinction of 0.11 magnitudes and it has an absolute magnitude of −0.02.

10 Trianguli has a stellar classification of A2 V, 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 and a slightly enlarged radius 3.71 times that of the Sun. It radiates 108 times the luminosity of the Sun from its photosphere at an effective temperature of $$. 10 Trianguli is rather evolved for its class, having completed 92.5% of its main sequence lifetime at the age of 372 million years. It is metal enriched with an iron abundance of [Fe/H] = +0.33 or % of the Sun's and unlike most hot stars, it spins modestly with a projected rotational velocity of $$.

10 Trianguli has a 13th magnitude companion located 58.3" away along a position angle of 205°. It is an unrelated background star that is much more distant than 10 Trianguli. Together with ι Trianguli and 12 Trianguli, it forms part of the obsolete Triangulum Minus.