14 Trianguli

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14 Trianguli
Triangulum constellation map.svg
Red circle.svg
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]
Distance 433 ± 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
Mass 1.85±0.09 [8]   M☉
Radius 40.5±2.1 [9]   R☉
Luminosity 373±11 [10]   L☉
Surface gravity (log g)1.65 [11]   cgs
Temperature 3,957 [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
SIMBAD data

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]

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<span class="mw-page-title-main">2 Piscis Austrini</span> Star in the constellation Microscopium

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<span class="mw-page-title-main">8 Leonis Minoris</span> Star in the constellation of Leo Minor

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<span class="mw-page-title-main">HD 198716</span> Star in the constellation of Microscopium

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References

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  17. ↑ Gontcharov, George A.; Mosenkov, Aleksandr V. (28 September 2017). "Verifying reddening and extinction for Gaia DR1 TGAS main sequence stars". Monthly Notices of the Royal Astronomical Society. 472 (4): 3805–3820. arXiv: 1709.01160 . Bibcode:2017MNRAS.472.3805G. doi: 10.1093/mnras/stx2219 . eISSN   1365-2966. ISSN   0035-8711.
  18. ↑ McDonald, A. R. E.; Hearnshaw, J. B. (1 October 1983). "The Wolf 630 moving group of stars". Monthly Notices of the Royal Astronomical Society. 204 (3): 841–852. Bibcode:1983MNRAS.204..841M. doi: 10.1093/mnras/204.3.841 . eISSN   1365-2966. ISSN   0035-8711.

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