18 Sagittarii

Star in the constellation Sagittarius J2000.0 (ICRS) Sagittarius 18 25 01.42727 −30 45 23.6167 5.58 red giant branch K0 III 1.138 −18.7 2.9 −134.805 −71.730 5.7300 0.1342 −0.93 29 309 4,341 −0.79 1.50 1.0 18 Sgr −30°15661 169233 90260 6888 210116 18+Sgr 18 Sagittarii is a single star in zodiac constellation of Sagittarius, located around 570 light years away from the Sun based on parallax. It is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 5.58. This object is moving closer to the Earth with a heliocentric radial velocity of −19 km/s. This is an aging giant star with a stellar classification of K0 III, which indicates it has exhausted the hydrogen at its core and evolved away from the main sequence. It has expanded to about 29 times the Sun's radius and is radiating 309 times the Sun's luminosity from its enlarged photosphere at an effective temperature of commas 4,341 K. There is a much lower abundance of iron in the spectrum compared to the Sun. References 4046389745966567680 18 Sgr 2019-03-24 90260 Stassun Keivan G. Oelkers Ryan J. Paegert Martin Torres Guillermo Pepper Joshua De Lee Nathan Collins Kevin Latham David W. Muirhead Philip S. Chittidi Jay Rojas-Ayala Bárbara Fleming Scott W. Rose Mark E. Tenenbaum Peter Ting Eric B. Kane Stephen R. Barclay Thomas Bean Jacob L. Brassuer C. E. Charbonneau David Ge Jian Lissauer Jack J. Mann Andrew W. McLean Brian Mullally Susan Narita Norio Plavchan Peter Ricker George R. Sasselov Dimitar Seager S. 1 The Revised TESS Input Catalog and Candidate Target List The Astronomical Journal 2019 158 4 138 10.3847/1538-3881/ab3467 free 1905.10694 2019AJ....158..138S 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 2008 0806.2878 2008MNRAS.389..869E 10.1111/j.1365-2966.2008.13596.x free 14878976 . 1 Randich S. Gratton R. Pallavicini R. Pasquini L. Carretta E. Lithium in population I subgiants Astronomy and Astrophysics 348 487–500 August 1999 1999A&A...348..487R Houk Nancy 3 1979 Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars Ann Arbor, Michigan Dept. of Astronomy, University of Michigan 1982mcts.book.....H . Category:K0III stars Category:Sagittarius (constellation) Category:Durchmusterung objects Sagittarii, 18 169233 090260 6888