Constellation Microscopium star
Beta Microscopii (Beta Mic ), Latinized from β Microscopii , is a solitary star in the constellation Microscopium . It is close to the lower limit of stars that are visible to the naked eye having an apparent visual magnitude of 6.05[ 2] parallax shift of mas [ 1] light years away[ 1] Sun . At that distance, the visual magnitude is diminished by an extinction factor of 0.19 due to interstellar dust .[ 11]
Beta Mic has a stellar classification of A1 IV,[ 3] A-type subgiant . Older sources give it a class of A2 Vn,[ 15] A-type main-sequence star with nebulous absorption lines due to rapid rotation. Consistent with the older classification, the star is spinning rapidly with a projected rotational velocity of km/s [ 12] mass of the Sun [ 7] radius of R ☉ [ 8] luminosity of the Sun [ 6] photosphere at an effective temperature of K [ 10] metallicity and is estimated to be around 340 million years old.[ 11]
References
^ a b c d e f 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 Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics . 355 : L27 – L30 . Bibcode :2000A&A...355L..27H . ISSN 0004-6361 . ^ a b Houk, N. (1982). Michigan Catalogue of Two-dimensional Spectral Types for the HD stars. Volume_3. Declinations -40_ƒ0 to -26_ƒ0 . Bibcode :1982mcts.book.....H . ^ Corben, P. M.; Stoy, R. H. (1968), "Photoelectric Magnitudes and Colours for Bright Southern Stars", Monthly Notes of the Astronomical Society of Southern Africa , 27 : 11, Bibcode :1968MNSSA..27...11C . ^ Gontcharov, G. A. (November 2006), "Pulkovo Compilation of Radial Velocities for 35 495 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 . ^ 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 119257644 . ^ 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 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 . ^ Steinmetz, Matthias; et al. (27 July 2020). "The Sixth Data Release of the Radial Velocity Experiment (Rave). II. Stellar Atmospheric Parameters, Chemical Abundances, and Distances" . The Astronomical Journal . 160 (2): 83. arXiv :2002.04512 Bibcode :2020AJ....160...83S . doi :10.3847/1538-3881/ab9ab8 eISSN 1538-3881 . ^ a b Anders, F.; et al. (February 2022). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia EDR3 stars brighter than G = 18.5" . Astronomy & Astrophysics . 658 : A91. arXiv :2111.01860 Bibcode :2022A&A...658A..91A . doi :10.1051/0004-6361/202142369 eISSN 1432-0746 . ISSN 0004-6361 . ^ a b c d Gontcharov, G. A. (December 2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters . 38 (12): 771– 782. arXiv :1606.08814 Bibcode :2012AstL...38..771G . doi :10.1134/S1063773712120031 . ISSN 0320-0108 . S2CID 255201789 . ^ a b Díaz, C. G.; González, J. F.; Levato, H.; Grosso, M. (July 2011). "Accurate stellar rotational velocities using the Fourier transform of the cross correlation maximum" . Astronomy & Astrophysics . 531 : A143. arXiv :1012.4858 Bibcode :2011A&A...531A.143D . doi :10.1051/0004-6361/201016386 eISSN 1432-0746 . ISSN 0004-6361 . ^ Gould, Benjamin Apthorp (1878). "Uranometria Argentina : brillantez y posicion de las estrellas fijas, hasta la septima magnitud, comprendidas dentro de cien grados del polo austral : con atlas". Resultados del Observatorio Nacional Argentino . 1 . Bibcode :1879RNAO....1.....G . ^ "bet Mic" . SIMBAD Centre de données astronomiques de Strasbourg . Retrieved 2017-08-14 .{{cite web }}: CS1 maint: postscript (link )^ Evans, D. S. (1966). "Fundamental data for Southern stars (6th list)". Royal Greenwich Observatory Bulletins . 110 : 185. Bibcode :1966RGOB..110..185E .
