1 Trianguli
Star in the constellation Triangulum / From Wikipedia, the free encyclopedia
1 Trianguli, also known as HD 10407, is a star located in the northern constellation Triangulum. It has an apparent magnitude of 7.52,[2] making it readily visible in binoculars but not to the naked eye. Gaia DR3 parallax measurements imply a distance of 723 light years[1] and it is currently receding with a heliocentric radial velocity of 7 km/s.[4] At its current distance 1 Trianguli's brightness is diminished by a quarter of a magnitudes due to interstellar dust[12] and it has an absolute magnitude of +0.78.[5] Even though it has a Flamsteed designation, 1 Trianguli is one of the 220 Flamsteed stars that are not in the Yale Bright Star Catalogue.[13]
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Triangulum |
Right ascension | 01h 42m 05.92475s[1] |
Declination | +29° 30′ 21.8431″[1] |
Apparent magnitude (V) | 7.52±0.01[2] |
Characteristics | |
Evolutionary stage | main sequence star[1] |
Spectral type | A2 V[3] |
B−V color index | +0.06[2] |
Astrometry | |
Radial velocity (Rv) | 7±4.5[4] km/s |
Proper motion (μ) | RA: −10.545 mas/yr[1] Dec.: −0.288 mas/yr[1] |
Parallax (π) | 4.5114 ± 0.0515 mas[1] |
Distance | 723 ± 8 ly (222 ± 3 pc) |
Absolute magnitude (MV) | +0.78[5] |
Details | |
Mass | 2.36+0.34 −0.30[6] M☉ |
Radius | 2.69±0.14[7] R☉ |
Luminosity | 52+1.5 −2.2[1] L☉ |
Surface gravity (log g) | 3.90[8] cgs |
Temperature | 9,305+145 −192[6] K |
Metallicity [Fe/H] | −0.02[8] dex |
Age | 371±23[9][10] Myr |
Other designations | |
Database references | |
SIMBAD | data |
1 Trianguli has a stellar classification of A2 V,[3] indicating that it is an ordinary A-type main-sequence star. It has 2.36 times the mass of the Sun[6] and 2.69 times the Sun's radius.[7] It radiates 52 times the luminosity of the Sun[1] from its photosphere at an effective temperature of 9,305 K,[6] giving it a white hue. It has a near solar metallicity at [Fe/H] = −0.02[8] and 1 Trianguli is estimated to be 371 million years old.[9][10]