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[1] mas
Distance590 ± 30 ly
(182 ± 8 pc)
Absolute magnitude (MV)−0.52[6]
Details
Mass3.25±0.05[3] M
Radius2.0[7] R
Luminosity213.9+23.8
−21.4
[3] L
Temperature9,908+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
SIMBADdata

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[edit]

  1. ^ a b c d e 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. ^ a b c d 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. ^ a b c d e 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.
  4. ^ a b 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. ^ a b Wilson, Ralph Elmer (1953). "General catalogue of stellar radial velocities". Carnegie Institution of Washington. Bibcode:1953GCRV..C......0W.
  6. ^ a b 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.
  7. ^ a b 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: 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451.
  8. ^ a b 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.
  9. ^ "g Aql -- Star", SIMBAD Astronomical Object Database, Centre de Données astronomiques de Strasbourg, retrieved 2012-07-22.
  10. ^ a b 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, A84.

External links[edit]