Star in the constellation Aquarius
16 Aquarii , abbreviated 16 Aqr , is a star in the constellation of Aquarius . 16 Aquarii is the Flamsteed designation . It is a faint star, just visible to the naked eye, with an apparent visual magnitude of 5.869.[ 2] parallax shift of mas [ 1] light years away. It is moving closer to the Earth with a heliocentric radial velocity of −6 km/s,[ 5] [ 4]
At the estimated age of 740 million years, this is an aging giant star currently on the red giant branch [ 7] stellar classification of G7 III.[ 3] core and is generating energy via hydrogen fusion along a shell surrounding a hot core of inert helium. The star has 2.3 times the mass of the Sun and has expanded to 8 times the Sun's radius . It is radiating 37 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 5,096 K.[ 7]
References
^ a b c d 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 ^ a b Soubiran, Caroline; Le Campion, Jean-François; Brouillet, Nathalie; Chemin, Laurent (2016), "The PASTEL catalogue: 2016 version", Astronomy & Astrophysics , 591 : A118, arXiv :1605.07384 Bibcode :2016A&A...591A.118S , doi :10.1051/0004-6361/201628497 , S2CID 119258214 . ^ a b Houk, N.; Swift, C. (1999), "Michigan catalogue of two-dimensional spectral types for the HD Stars", Michigan Spectral Survey , 5 , Bibcode :1999MSS...C05....0H . ^ a b c 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 , S2CID 119257644 . ^ a b Gontcharov, G. A. (2006), "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system", Astronomy Letters , 32 (11): 759– 771, arXiv :1606.08053 Bibcode :2006AstL...32..759G , doi :10.1134/S1063773706110065 , S2CID 119231169 . ^ a b van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics , 474 (2): 653– 664, arXiv :0708.1752 Bibcode :2007A&A...474..653V , doi :10.1051/0004-6361:20078357 , S2CID 18759600 . ^ a b c Reffert, Sabine; et al. (2015), "Precise radial velocities of giant stars. VII. Occurrence rate of giant extrasolar planets as a function of mass and metallicity", Astronomy & Astrophysics , 574 : A116, arXiv :1412.4634 Bibcode :2015A&A...574A.116R , doi :10.1051/0004-6361/201322360 , S2CID 59334290 . ^ Hekker, S.; Meléndez, J. (2007), "Precise radial velocities of giant stars. III. Spectroscopic stellar parameters", Astronomy and Astrophysics , 475 (3): 1003, arXiv :0709.1145 Bibcode :2007A&A...475.1003H , doi :10.1051/0004-6361:20078233 , S2CID 10436552 . ^ "16 Aqr" . SIMBAD Centre de données astronomiques de Strasbourg . Retrieved October 22, 2018 .
