Star in the constellation Grus
Mu2 Gruis , Latinized from μ2 Gruis , is a yellow-hued star or star system in the southern constellation of Grus . It is a suspected astrometric binary , showing a variation in proper motion due to gravitational acceleration.[ 7] 2 Gruis is visible to the naked eye with an apparent visual magnitude of 5.10.[ 2] parallax shift of 13.2 mas as seen from the Earth,[ 1] light years . It is drifting further away with a heliocentric radial velocity of +12.5 km/s.[ 4]
The primary component is an evolved giant star with a stellar classification of G8 III.[ 3] variable star , showing a change in brightness with an amplitude of 0.004 magnitude at the rate of 7.50983 times per day.[ 8] core exhausted, the star has cooled and expanded until now it has 10 times the radius of the Sun . It is radiating 56[ 1] luminosity of the Sun from its swollen photosphere at an effective temperature of 5,009 K.[ 1]
References
^ a b c d e f g h i j k 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 Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory , 4 (99): 99, Bibcode :1966CoLPL...4...99J . ^ a b Houk, N. (1978), Michigan catalogue of two-dimensional spectral types for the HD stars , vol. 2, Dept. of Astronomy, University of Michigan, Bibcode :1978mcts.book.....H . ^ a b Gontcharov, G. A. (November 2006), "Pulkovo Compilation of Radial Velocities for 35495 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 . ^ 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 . ^ "mu.02 Gru -- Star" , SIMBAD Astronomical Database , Centre de Données astronomiques de Strasbourg , retrieved 2017-06-26 .^ Makarov, V. V.; Kaplan, G. H. (May 2005), "Statistical Constraints for Astrometric Binaries with Nonlinear Motion", The Astronomical Journal , 129 (5): 2420– 2427, Bibcode :2005AJ....129.2420M , doi :10.1086/429590 ^ Koen, Chris; Eyer, Laurent (2002), "New periodic variables from the Hipparcos epoch photometry", Monthly Notices of the Royal Astronomical Society , 331 (1): 45– 59, arXiv :astro-ph/0112194 Bibcode :2002MNRAS.331...45K , doi :10.1046/j.1365-8711.2002.05150.x S2CID 10505995 .
Information related to Mu2 Gruis
