14 Aquilae

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14 Aquilae
Observation data
Epoch J2000       Equinox J2000
Constellation Aquila
Right ascension 19h 02m 54.50105s [1]
Declination −03° 41′ 56.2881″ [1]
Apparent magnitude  (V)5.42 [2]
Characteristics
Evolutionary stage main sequence [3]
Spectral type A1 V [4]
U−B color index –0.07 [2]
B−V color index +0.00 [2]
Astrometry
Radial velocity (Rv)−39.0±3.7 [5] km/s
Proper motion (μ)RA: +15.558 [1] mas/yr
Dec.: +2.571 [1] mas/yr
Parallax (π)5.4932±0.2368  mas [1]
Distance 590 ± 30  ly
(182 ± 8  pc)
Absolute magnitude  (MV)−0.52 [6]
Details
Mass 3.25±0.05 [3]   M☉
Radius 2.0 [7]   R☉
Luminosity 213.9+23.8
−21.4 [3]   L☉
Temperature 9,908+46
−45 [3]   K
Rotational velocity (v sin i)23 [8]  km/s
Other designations
14 Aql, BD−03°4460, HD 176984, HIP 93526, HR 7209, SAO 142959, WDS J19029-0342 [9]
Database references
SIMBAD data

14 Aquilae is a probable spectroscopic binary [10] star system in the equatorial constellation of Aquila. 14 Aquilae is the Flamsteed designation though it also bears the Bayer designation g Aquilae. It is visible to the naked eye as a dim, white-hued star with an apparent visual magnitude of 5.42, [2] and it is located at a distance of approximately 500 light-years (150 parsecs ) from Sun. The star is moving closer to the Earth with a heliocentric radial velocity of −39 km/s, [5] and may come as close as 136 light-years in around 3.5 million years. [6]

The visible component is an A-type main sequence star with a stellar classification of A1 V. [4] It has 3.25 [3] times the mass of the Sun and about twice the Sun's radius. The projected rotational velocity is relatively low [10] at 23 km/s. [8] The star is radiating 214 [7] times the luminosity of the Sun from its photosphere at an effective temperature of 9,908 K.

References

  1. 1 2 3 4 5 Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics . 616. A1. arXiv: 1804.09365 . Bibcode: 2018A&A...616A...1G . doi: 10.1051/0004-6361/201833051 . Gaia DR2 record for this source at VizieR.
  2. 1 2 3 4 Nicolet, B. (1978). "Photoelectric photometric Catalogue of homogeneous measurements in the UBV System". Astronomy and Astrophysics Supplement Series. 34: 1–49. Bibcode:1978A&AS...34....1N.
  3. 1 2 3 4 5 Zorec, J.; Royer, F.; Asplund, Martin; Cassisi, Santi; Ramirez, Ivan; Melendez, Jorge; Bensby, Thomas; Feltzing, Sofia (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy and Astrophysics, 537: A120, arXiv: 1201.2052 , Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691, S2CID   55586789.
  4. 1 2 Cowley, A.; et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal, 74: 375–406, Bibcode:1969AJ.....74..375C, doi:10.1086/110819.
  5. 1 2 Wilson, Ralph Elmer (1953). "General catalogue of stellar radial velocities". Carnegie Institute Washington D.C. Publication. Carnegie Institution of Washington. Bibcode:1953GCRV..C......0W.
  6. 1 2 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv: 1108.4971 , Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID   119257644.
  7. 1 2 Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics", Astronomy and Astrophysics, 367 (2): 521–524, arXiv: astro-ph/0012289 , Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID   425754.
  8. 1 2 Royer, F.; Zorec, J.; Gómez, A. E. (February 2007), "Rotational velocities of A-type stars. III. Velocity distributions", Astronomy and Astrophysics, 463 (2): 671–682, arXiv: astro-ph/0610785 , Bibcode:2007A&A...463..671R, doi:10.1051/0004-6361:20065224, S2CID   18475298.
  9. ↑ "g Aql -- Star", SIMBAD Astronomical Object Database, Centre de Données astronomiques de Strasbourg , retrieved 2012-07-22.
  10. 1 2 Royer, F.; et al. (February 2014), "Normal A0-A1 stars with low rotational velocities. I. Abundance determination and classification", Astronomy & Astrophysics, 562: 21, arXiv: 1401.2372 , Bibcode:2014A&A...562A..84R, doi:10.1051/0004-6361/201322762, S2CID   54511685, A84.
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