Astronomy:14 Aquilae
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| 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 |
| 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 | |
| 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
- ↑ 1.0 1.1 1.2 1.3 1.4 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 2.0 2.1 2.2 2.3 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.
- ↑ 3.0 3.1 3.2 3.3 3.4 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, doi:10.1051/0004-6361/201117691, Bibcode: 2012A&A...537A.120Z.
- ↑ 4.0 4.1 Cowley, A. et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal 74: 375–406, doi:10.1086/110819, Bibcode: 1969AJ.....74..375C.
- ↑ 5.0 5.1 Wilson, Ralph Elmer (1953). "General catalogue of stellar radial velocities". Carnegie Institute Washington D.C. Publication (Carnegie Institution of Washington). Bibcode: 1953GCRV..C......0W.
- ↑ 6.0 6.1 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 7.0 7.1 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, doi:10.1051/0004-6361:20000451, Bibcode: 2001A&A...367..521P.
- ↑ 8.0 8.1 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, doi:10.1051/0004-6361:20065224, Bibcode: 2007A&A...463..671R.
- ↑ "g Aql -- Star", SIMBAD Astronomical Object Database (Centre de Données astronomiques de Strasbourg), http://simbad.u-strasbg.fr/simbad/sim-id?Ident=14+Aquilae, retrieved 2012-07-22.
- ↑ 10.0 10.1 Royer, F. et al. (February 2014), "Normal A0-A1 stars with low rotational velocities. I. Abundance determination and classification", Astronomy & Astrophysics 562: 21, doi:10.1051/0004-6361/201322762, A84, Bibcode: 2014A&A...562A..84R.
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