Star in the constellation Chamaeleon
μ1 Chamaeleontis , Latinized as Mu1 Chamaeleontis , is a single[ 12] star in the southern circumpolar constellation Chamaeleon . It is dimly visible to the naked eye with an apparent visual magnitude of 5.53.[ 2] Based upon parallax measurements, it is located approximately 403 light-years away from the Sun .[ 1] The radial velocity is poorly constrained, but it appears to be drifting further away at the rate of about 16 km/s [ 5]
This object has a stellar classification of A0 IV,[ 3] matching an A-type subgiant star. It has 2.6 times the mass of the Sun [ 6] and an effective temperature of 10,141 K ,[ 9] giving a bluish white glow. Due to its slightly enlarged radius ,[ 7] the star has a luminosity over 90 times that of the Sun [ 8] and spins rapidly with a projected rotational velocity of 150 km/s .[ 10] Mu1 Chamaeleontis' metallicity – elements heavier than helium – is 66% that of the Sun.[ 6]
References
^ a b c d e Brown, A. G. A. ; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties" . Astronomy & Astrophysics . 649 : A1. arXiv :2012.01533 . Bibcode :2021A&A...649A...1G . doi :10.1051/0004-6361/202039657 . S2CID 227254300 . (Erratum: doi :10.1051/0004-6361/202039657e ) . Gaia EDR3 record for this source at VizieR .
^ a b c Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters . 38 (5): 331–346. arXiv :1108.4971 . Bibcode :2012AstL...38..331A . doi :10.1134/S1063773712050015 . ISSN 1063-7737 . S2CID 255204555 .
^ a b Houk, N.; Cowley, A. P. (1975). University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations -90_ to -53_ƒ0 . Bibcode :1975mcts.book.....H .
^ a b Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory . 4 : 99–110. Bibcode :1966CoLPL...4...99J .
^ a b Kharchenko, N.V.; Scholz, R.-D.; Piskunov, A.E.; Röser, S.; Schilbach, E. (November 2007). "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ~55000 stars and mean radial velocities of 516 Galactic open clusters and associations" . Astronomische Nachrichten . 328 (9): 889–896. arXiv :0705.0878 . Bibcode :2007AN....328..889K . doi :10.1002/asna.200710776 . ISSN 0004-6337 .
^ a b c d e Anders, F.; et al. (August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18" . Astronomy & Astrophysics . 628 : A94. arXiv :1904.11302 . Bibcode :2019A&A...628A..94A . doi :10.1051/0004-6361/201935765 . ISSN 0004-6361 .
^ a b Kervella, Pierre; Arenou, Frédéric; Thévenin, Frédéric (2022). "Stellar and substellar companions from Gaia EDR3" . Astronomy & Astrophysics . 657 : A7. arXiv :2109.10912 . Bibcode :2022A&A...657A...7K . doi :10.1051/0004-6361/202142146 . eISSN 1432-0746 . ISSN 0004-6361 .
^ a b McDonald, I.; Zijlstra, A. A.; Watson, R. A. (15 June 2017). "Fundamental parameters and infrared excesses of Tycho–Gaia stars" . Monthly Notices of the Royal Astronomical Society . 471 (1): 770–791. arXiv :1706.02208 . Bibcode :2017MNRAS.471..770M . doi :10.1093/mnras/stx1433 . eISSN 1365-2966 . ISSN 0035-8711 .
^ a b Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List" . The Astronomical Journal . 158 (4): 138. arXiv :1905.10694 . Bibcode :2019AJ....158..138S . doi :10.3847/1538-3881/ab3467 . ISSN 0004-6256 .
^ a b Huang, Su-Shu (September 1953). "A Statistical Study of the Rotation of the Stars" . The Astrophysical Journal . 118 : 285. Bibcode :1953ApJ...118..285H . doi :10.1086/145751 . eISSN 1538-4357 . ISSN 0004-637X .
^ "mu. Cha" . SIMBAD . Centre de données astronomiques de Strasbourg .
^ Eggleton, P. P.; Tokovinin, A. A. (11 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 . eISSN 1365-2966 . ISSN 0035-8711 .