Eta Reticuli
Star in the constellation Reticulum
Eta Reticuli , Latinized from η Reticuli , is a solitary[10] star in the southern constellation of Reticulum . With an apparent visual magnitude of 5.22,[2] it is faintly visible to the naked eye on a dark night. Based upon an annual parallax shift of 8.48 mas ,[1] it is located at a distance of roughly 385 light years from the Sun . It may be a member of the high-velocity Zeta Herculis Moving Group of stars that share a common motion through space.[5]
This is an evolved G-type giant star with a stellar classification of G7 III.[3] Based upon stellar models, it has an estimated 2.54[6] times the mass of the Sun and 13.24[7] times the Sun's radius . With an age of around 1.17 billion years, it is radiating 120 times the solar luminosity from its outer atmosphere at an effective temperature of 4,948 K.[6]
Eta Reticuli is moving through the Galaxy at a speed of 117.6 km/s relative to the Sun. Its projected Galactic orbit carries it between 11,700 and 31,600 light years from the center of the Galaxy.[11]
References
^ a b c d e f 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^ a b c d Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data , Bibcode :1986EgUBV........0M .
^ a b Houk, Nancy; Cowley, A. P. (1979), Michigan catalogue of two-dimensional spectral types for the HD stars , vol. 1, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode :1978mcts.book.....H .
^ de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics , 546 : 14, arXiv :1208.3048 , Bibcode :2012A&A...546A..61D , doi :10.1051/0004-6361/201219219 , S2CID 59451347 , A61.
^ a b Eggen, O. J. (1958), "Stellar groups. II. The ζ Herculis, ɛ Indi and 61 Cygni groups of high-velocity stars", Monthly Notices of the Royal Astronomical Society , 118 (2): 154, Bibcode :1958MNRAS.118..154E , doi :10.1093/mnras/118.2.154 .
^ a b c Luck, R. Earle (September 2015), "Abundances in the Local Region. I. G and K Giants", The Astronomical Journal , 150 (3): 23, arXiv :1507.01466 , Bibcode :2015AJ....150...88L , doi :10.1088/0004-6256/150/3/88 , S2CID 118505114 , 88.
^ a b Pasinetti Fracassini, L. E.; et al. (2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy & Astrophysics , 367 (2) (3rd ed.): 521–24, arXiv :astro-ph/0012289 , Bibcode :2001A&A...367..521P , doi :10.1051/0004-6361:20000451 , S2CID 425754 .
^ Alves, S.; et al. (April 2015), "Determination of the spectroscopic stellar parameters for 257 field giant stars", Monthly Notices of the Royal Astronomical Society , 448 (3): 2749–2765, arXiv :1503.02556 , Bibcode :2015MNRAS.448.2749A , doi :10.1093/mnras/stv189 .
^ "eta Ret" . SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2017-02-15 .{{cite web }}
: CS1 maint: postscript (link )
^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society , 389 (2): 869–879, arXiv :0806.2878 , Bibcode :2008MNRAS.389..869E , doi :10.1111/j.1365-2966.2008.13596.x , S2CID 14878976 .
^ "Eta Reticuli (HIP 20384)" . Archived from the original on 2014-05-04. Retrieved 2012-08-17 .