19 Aquarii

White-hued hydrogen-burning star in the constellation Aquarius Aquarius J2000 21 25 13.016296894198082390222464 -09 44 54.7923 +5.713The Tycho-2 catalogue of the 2.5 million brightest stars Høg, E. etal 2000 Astronomy and Astrophysics 355 L27–L30 2000A&A...355L..27H main sequenceZorec J. Royer F. Rotational velocities of A-type stars. IV. Evolution of rotational velocities Astronomy and Astrophysics 2012 537 A120 10.1051/0004-6361/201117691 free 1201.2052 2012A&A...537A.120Z A8V1999MSS...C05....0H Michigan catalogue of two-dimensional spectral types for the HD Stars, Vol. 5 Michigan Spectral Survey 5 0 Houk, N. Swift, C. 1999 +0.20UBVRIJKL Photometry of the Bright Stars Johnson, H. L. Communications of the Lunar and Planetary Laboratory 4 99 1966 1966CoLPL...4...99J −20.6 1.8Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system Gontcharov, G. A. 2006 Astronomy Letters 32 11 759–771 2006AstL...32..759G 10.1134/S1063773706110065 1606.08053 119231169 +25.943 −167.548 12.5593 0.1676 0.90105761 1.86David Trevor J. Hillenbrand Lynne A. The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets The Astrophysical Journal 804 2 146 2015 2015ApJ...804..146D 10.1088/0004-637X/804/2/146 1501.03154 33401607 2.76 0.18 0.16 26.1 0.4 0.4 8078 275 commas 4.13 10210.1051/0004-6361:20065224 free Rotational velocities of A-type stars Astronomy and Astrophysics 463 2 671 2007 Royer F. Zorec J. Gómez A. E. astro-ph/0610785 2007A&A...463..671R 18475298 788 19 Aqr −10°5668 203875 105761 8195 145382 * 19 Aqr 22 March 2017 19+Aqr 19 Aquarii is a star in the zodiac constellation of Aquarius. With an apparent magnitude of about 5.7, the star is barely visible to the naked eye as a white-hued star (see Bortle scale). Parallax estimates put it at a distance of about 260 light years away from the Sun. The star is moving closer to the Earth with a heliocentric radial velocity of −21 km/s. This object is an A-type main-sequence star with a stellar classification of A8V. It is around 788 million years old with a fairly fast rotation rate, as its projected rotational velocity is about 155 km/s, so it must be rotating at least that fast. It has 1.86 times the mass of the Sun and 2.76 times the Sun's radius. 19 Aquarii is radiating 26 times the luminosity of the Sun from its photosphere at an effective temperature of 8,078 K. Eggen has this star flagged as a blue straggler and a member of the HR 1614 supercluster.Star Streams and Galactic Structure Eggen Olin J. Astronomical Journal 112 1595 October 1996 10.1086/118126 1996AJ....112.1595E References Category:A8V stars Category:Blue stragglers Category:Aquarius (constellation) Category:Durchmusterung objects Aquarii, 019 203875 105761 8195 zh:天鷹座19