Fomalhaut(redirected from Alpha Piscis Austrini)
Also found in: Dictionary.
Fomalhaut(fō`məlhôt'), brightest star in the constellation Piscis Austrinus (southern fish); Bayer designation Alpha Piscis Austrini; 1992 position R.A. 22h57.3m, Dec. −29°39'. A white, main-sequence star of spectral classspectral class,
in astronomy, a classification of the stars by their spectrum and luminosity. In 1885, E. C. Pickering began the first extensive attempt to classify the stars spectroscopically.
..... Click the link for more information. A3 V, its apparent magnitudemagnitude,
in astronomy, measure of the brightness of a star or other celestial object. The stars cataloged by Ptolemy (2d cent. A.D.), all visible with the unaided eye, were ranked on a brightness scale such that the brightest stars were of 1st magnitude and the dimmest stars
..... Click the link for more information. of 1.16 makes it one of the 20 brightest stars in the sky. Fomalhaut is one of the nearer bright stars, lying at a distance of 25 light-years. The star, also known as Fomalhaut A, is part of a triple-star system. Images made in 2004 and 2006 by the Hubble Space Telescope were believed to show a planet orbiting the star, but subsequent study has questioned that interpretation. The star's name is from the Arabic meaning "mouth of the southern fish."
The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved. www.cc.columbia.edu/cu/cup/
Fomalhaut(foh -măl-hawt) (α PsA) A white star that is the brightest in the constellation Piscis Austrinus. In 1983 the infrared satellite IRAS detected a shell of cool matter surrounding this star. The shell, which has a temperature of about 50 K, is thought to be solid material orbiting the star and forming a protoplanetary system. See also Vega. mv : 1.16; Mv : 2.0; spectral type: A3 V; distance: 6.7 pc.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.
(also a Piscis Austrinus), the brightest star in the constellation Piscis Austrinus. With a visual stellar magnitude of 1.2, Fomalhaut is 14 times brighter than the sun. It is located at a distance of seven parsecs from the sun.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
α Piscis Australis
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.