19 Aquilae

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19 Aquilae
19 Aquilae, 2007-04-21.jpg
Image captured from Mount Laguna, California
Observation data
Epoch J2000.0      Equinox
Constellation Aquila
Right ascension 19h 08m 59.91138s[1]
Declination +06° 04′ 23.5545″[1]
Apparent magnitude (V) 5.227[2]
Spectral type F0 III-IV[3]
Apparent magnitude (U) 5.59 ± 0.010[4]
Apparent magnitude (B) 5.57 ± 0.007[4]
Apparent magnitude (V) 5.23 ± 0.009[4]
U−B color index +0.020[2]
B−V color index +0.345[2]
Variable type suspected γ Dor[5]
Radial velocity (Rv) -46.7[6] km/s
Proper motion (μ) RA: -10.40 ± 0.54[1] mas/yr
Dec.: -77.22 ± 0.39[1] mas/yr
Parallax (π) 21.84 ± 0.48[1] mas
Distance 149 ± 3 ly
(46 ± 1 pc)
Absolute magnitude (MV) 1.94[7]
Surface gravity (log g) 4.13[3] cgs
Temperature 6,954[3] K
Metallicity [Fe/H] +0.03[3] dex
Rotational velocity (v sin i) 57.0[8] km/s
Age 1.3[7] Gyr
Other designations
BD+5 4040, FK5 3530, HD 178596, HIP 94068, HR 7266, SAO 124318.[4]
Database references

19 Aquilae (abbreviated 19 Aql) is a star in the equatorial constellation of Aquila. 19 Aquilae is the Flamsteed designation. It has an apparent visual magnitude of 5.23[2] and is about 149 light-years (46 parsecs) distant from the Earth.[1]


  1. ^ a b c d e f van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752Freely accessible, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357. 
  2. ^ a b c d Oja, T. (1986), "UBV photometry of stars whose positions are accurately known. III", Astronomy and Astrophysics Supplement Series, 65 (2): 405–4, Bibcode:1986A&AS...65..405O. 
  3. ^ a b c d Balachandran, Suchitra (May 1, 1990). "Lithium depletion and rotation in main-sequence stars". Astrophysical Journal, Part 1. 354: 310–332. Bibcode:1990ApJ...354..310B. doi:10.1086/168691. 
  4. ^ a b c d "19 Aql -- Variable Star", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2012-07-25. 
  5. ^ Poretti, E.; Garrido, R.; Amado, P. J.; Uytterhoeven, K.; Handler, G.; Alonso, R.; Martín, S.; Aerts, C.; Catala, C.; Goupil, M. J.; Michel, E.; Mantegazza, L.; Mathias, P.; Pretorius, M. L.; Belmonte, J. A.; Claret, A.; Rodríguez, E.; Suarez, J. C.; Vuthela, F. F.; Weiss, W. W.; Ballereau, D.; Bouret, J. C.; Charpinet, S.; Hua, T.; Lüftinger, T.; Nesvacil, N.; Van't Veer-Menneret, C. (2003). "Preparing the COROT space mission: Incidence and characterisation of pulsation in the lower instability strip". Astronomy and Astrophysics. 406: 203. arXiv:astro-ph/0304422Freely accessible. Bibcode:2003A&A...406..203P. doi:10.1051/0004-6361:20030711. 
  6. ^ Wielen, R.; et al. (1999), "Sixth Catalogue of Fundamental Stars (FK6). Part I. Basic fundamental stars with direct solutions", Veröff. Astron. Rechen-Inst. Heidelb, Astronomisches Rechen-Institut Heidelberg, 35 (35), Bibcode:1999VeARI..35....1W. 
  7. ^ a b Holmberg, J.; Nordström, B.; Andersen, J. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics", Astronomy and Astrophysics, 501 (3): 941–947, arXiv:0811.3982Freely accessible, Bibcode:2009A&A...501..941H, doi:10.1051/0004-6361/200811191. 
  8. ^ Schröder, C.; Reiners, A.; Schmitt, J. H. M. M. (January 2009), "Ca II HK emission in rapidly rotating stars. Evidence for an onset of the solar-type dynamo", Astronomy and Astrophysics, 493 (3): 1099–1107, Bibcode:2009A&A...493.1099S, doi:10.1051/0004-6361:200810377.