1 Trianguli

1 Trianguli
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]
Distance723 ± 8 ly
(222 ± 3 pc)
Absolute magnitude (MV)+0.78[5]
Details
Mass2.36+0.34
−0.30[6] M☉
Radius2.69±0.14[7] R☉
Luminosity52+1.5
−2.2[1] L☉
Surface gravity (log g)3.90[8] cgs
Temperature9,305+145
−192[6] K
Metallicity [Fe/H]−0.02[8] dex
Age371±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
SIMBADdata

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]

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]

  1. ^ a b c d e f g h Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Tycho2000 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Clausen1979 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  6. ^ a b c d Cite error: The named reference Stassun2019 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Kervella2004 was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference Anders2022 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Gontcharov2012A was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference Gontcharov2012B was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Gontcharov2017 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Bidelman1990 was invoked but never defined (see the help page).