Star in the constellation Chamaeleon
ν Chamaeleontis , Latinized as Nu Chamaeleontis , is a single[ 7] star in the southern circumpolar constellation of Chamaeleon . It is a yellow-hued star, dimly visible to the naked eye, with an apparent visual magnitude of 5.43.[ 2] This object is located at a distance of 189 light-years from the Sun, based on its parallax ,[ 1] and is drifting further away with a radial velocity of +11 km/s.[ 5] It has an absolute magnitude of 1.59.[ 2]
This object is an aging G-type giant star with a stellar classification of G8III.[ 3] Having exhausted the supply of hydrogen at its core , it has expanded and cooled off the main sequence ; at present it has 6.5[ 1] times the girth of the Sun. The star has 1.6[ 2] times the mass of the Sun and is radiating 24[ 1] times the Sun's luminosity from its swollen photosphere at an effective temperature of 5008 K.[ 1] These coordinates are a source for X-ray emission , which is most likely (99.3% chance) coming from the star.[ 8]
References
^ a b c d e f g h i j k l 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 . Gaia DR2 record for this source at VizieR .
^ a b c d e f g Allende Prieto, C.; Lambert, D. L. (1999). "Fundamental parameters of nearby stars from the comparison with evolutionary calculations: masses, radii and effective temperatures". Astronomy and Astrophysics . 352 : 555–562. arXiv :astro-ph/9911002 . Bibcode :1999A&A...352..555A .
^ a b Houk, N.; Cowley, A. P. (1975). University of Michigan Catalogue of two-dimensional spectral types for the HD stars . Vol. 1. Bibcode :1975mcts.book.....H .
^ a b Johnson, H. L. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory . 4 : 99. Bibcode :1966CoLPL...4...99J .
^ a b c de Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (2014). "A catalog of rotational and radial velocities for evolved stars. V. Southern stars". Astronomy & Astrophysics . 561 : A126. arXiv :1312.3474 . Bibcode :2014A&A...561A.126D . doi :10.1051/0004-6361/201220762 . S2CID 54046583 .
^ "nu. Cha" . SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2019-09-27 .
^ 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 .
^ Haakonsen, Christian Bernt; Rutledge, Robert E. (September 2009). "XID II: Statistical Cross-Association of ROSAT Bright Source Catalog X-ray Sources with 2MASS Point Source Catalog Near-Infrared Sources". The Astrophysical Journal Supplement . 184 (1): 138–151. arXiv :0910.3229 . Bibcode :2009ApJS..184..138H . doi :10.1088/0067-0049/184/1/138 . S2CID 119267456 .