14 Trianguli

14 Trianguli
Location of 14 Trianguli (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Triangulum
Right ascension 02h 32m 06.16977s[1]
Declination +36° 08′ 50.1813″[1]
Apparent magnitude (V) 5.14±0.01[2]
Characteristics
Spectral type K5 III[3]
U−B color index +1.78[4]
B−V color index +1.47[4]
Astrometry
Radial velocity (Rv)−36.8±0.3[5] km/s
Proper motion (μ) RA: +45.066 mas/yr[1]
Dec.: +11.901 mas/yr[1]
Parallax (π)7.5319 ± 0.1060 mas[1]
Distance433 ± 6 ly
(133 ± 2 pc)
Absolute magnitude (MV)−0.46[6]
Orbit[7]
Primary14 Tri A
Companion14 Tri B
Period (P)6,257±73 d
Eccentricity (e)0.22±0.04
Periastron epoch (T)2,448,284±166 JD
Argument of periastron (ω)
(secondary)		40±11°
Semi-amplitude (K1)
(primary)		2.27±0.09 km/s
Details
Mass1.85±0.09[8] M☉
Radius40.5±2.1[9] R☉
Luminosity373±11[10] L☉
Surface gravity (log g)1.65[11] cgs
Temperature3,957[12] K
Metallicity [Fe/H]−0.16[13] dex
Rotational velocity (v sin i)2.1±1.2[14] km/s
Other designations
14 Trianguli, AG+35°233, BD+35°497, FK5 1070, GC 3032, HD 15656, HIP 11784, HR 736, SAO 55635[15]
Database references
SIMBADdata

14 Trianguli (14 Tri), also known as HD 15656, is a spectroscopic binary[16] located in the northern constellation Triangulum. It has an apparent magnitude of 5.14,[2] making it faintly visible to the naked eye in ideal conditions. Gaia DR3 parallax measurements place the system 433 light years away,[1] and it is currently approaching the Solar System with a heliocentric radial velocity of −37 km/s.[5] At its current distance, 14 Tri's brightness is diminished by 0.21 magnitude due to interstellar dust.[17] It has an absolute magnitude of −0.46.[6]

The visible component is an evolved red giant with a stellar classification of K5 III. It has 1.85 times the mass of the Sun,[8] but it has expanded to 40.5 times its girth.[9] It radiates 373 times the luminosity of the Sun[10] from its photosphere at an effective temperature of 3,957 K,[12] giving it an orangish-red hue. 14 Tri is slightly metal-deficient with [Fe/H] = −0.16,[13] and spins modestly with a projected rotational velocity of 2.1 km/s.[14] This is a single-lined spectroscopic binary that completes an eccentric orbit within 17 years. The secondary star has not been detected visually or in the spectrum and is expected to be a low-mass red dwarf or white dwarf.[7] 14 Tri may be part of the Wolf 630 moving group.[18]

  1. ^ a b c d e Cite error: The named reference DR3 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Tycho2000 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Roman1952 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Argue1966 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Famaey2005 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference griffin1994 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Kervella2021 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Kervella2004 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Mass2016 was invoked but never defined (see the help page).
  12. ^ a b Cite error: The named reference di Bendetto1998 was invoked but never defined (see the help page).
  13. ^ a b Cite error: The named reference McWilliam1990 was invoked but never defined (see the help page).
  14. ^ a b Cite error: The named reference de Medeiros1999 was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  16. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  17. ^ Cite error: The named reference Gontcharov2017 was invoked but never defined (see the help page).
  18. ^ Cite error: The named reference McDonald1983 was invoked but never defined (see the help page).