| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Triangulum |
| Right ascension | 01h42m 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 | |
1 Trianguli, AG+29°220, BD+28°282, GC 2068, HD 10407, HIP 7948, SAO 74880, GSC 01762-00704[11] | |
| Database references | |
| SIMBAD | data |
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 velocityof7 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]
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 temperatureof9,305 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]
