15 Aquilae

Star in the constellation Aquila J2000 19 04 57.67233 -04 01 53.1059 5.41 Aquila K1 III +1.12 +1.01 -23.17 0.61 +21.90 −26.05 11.27 0.36 0.414 14 83 4,560 −0.25 2.65 3.4 4.09 ± 2.07 h Aquilae 1859-04 -04°4684 177463 93717 7225 142996 15+Aql 15 Aquilae (abbreviated 15 Aql) is a star in the equatorial constellation of Aquila. 15 Aquilae is the Flamsteed designation; it also bears the Bayer designation h Aquilae. The apparent visual magnitude is 5.41, so it is faintly visible to the naked eye. An optical companion, HD 177442, is 39 arc seconds away from it The distance to 15 Aquilae can be estimated from its annual parallax shift of 11.27 mas, yielding a range of approximately 289 ly pc off on from Earth with a 9 light-year margin of error. With a stellar classification of K1 III, the spectrum of 15 Aquilae matches a giant star with an age of roughly four billion years. At this stage of its evolution, the outer atmosphere of the star has expanded to 14 times the radius of the Sun. It is radiating 83 times the Sun's luminosity into space at an effective temperature of 4,560 K. This heat gives it the orange-hued glow of a K-type star. This star is most likely a member of the thin disk population of the Milky Way. It is orbiting through the galaxy with an eccentricity of 0.06, which carries it as close as 24.30 kly kpc on on to the Galactic Center, and as far away as 27.60 kly kpc on. The orbital inclination carries it no more than 196 ly pc on off from the galactic plane. References F. van Leeuwen November 2007 Validation of the new Hipparcos reduction Astronomy and Astrophysics 474 2 653–664 2007A&A...474..653V 10.1051/0004-6361:20078357 . 0708.1752 18759600 Eggleton P. P. Tokovinin A. A. A catalogue of multiplicity among bright stellar systems Monthly Notices of the Royal Astronomical Society 389 2 869–879 10.1111/j.1365-2966.2008.13596.x 2008MNRAS.389..869E 0806.2878 September 2008 free 14878976 . 1 Frasca A. Covino E. Spezzi L. Alcalá J. M. Marilli E. Fżrész G. Gandolfi D. REM near-IR and optical photometric monitoring of pre-main sequence stars in Orion. Rotation periods and starspot parameters Astronomy and Astrophysics 508 3 1313–1330 10.1051/0004-6361/200913327 2009A&A...508.1313F . December 2009 0911.0760 118361131 1 Massarotti Alessandro Latham David W. Stefanik Robert P. Fogel Jeffrey Rotational and Radial Velocities for a Sample of 761 HIPPARCOS Giants and the Role of Binarity The Astronomical Journal 135 1 209–231 10.1088/0004-6256/135/1/209 2008AJ....135..209M . January 2008 121883397 free Cousins A. W. J. Photometric Data for Stars in the Equatorial Zone (Seventh List) Monthly Notes of the Astronomical Society of Southern Africa 23 175 1964 1964MNSSA..23..175C . 1 Soubiran C. Bienaymé O. Mishenina T. V. Kovtyukh V. V. Vertical distribution of Galactic disk stars. IV. AMR and AVR from clump giants Astronomy and Astrophysics 2008 480 1 91–101 2008A&A...480...91S 10.1051/0004-6361:20078788 . 0712.1370 16602121 15 Aql 2012-07-22 . cs2 The Colour of Stars December 21, 2004 Australia Telescope, Outreach and Education Commonwealth Scientific and Industrial Research Organisation http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html 2012-07-21 . dead https://web.archive.org/web/20120222183238/http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html February 22, 2012 External links Image 15 Aquilae Aquilae, h 177442 and 177463 Category:Aquila (constellation) 093717 Category:K1III stars Aquilae, 15 7225 BD-04 4684