Deneb


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Deneb

(dĕn`ĕb), brightest star in the constellation CygnusCygnus
[Lat.,=the swan], northern constellation located SE of Draco and NW of Pegasus. It was depicted as a bird by most ancient cultures. It is sometimes called the Northern Cross because five of its brightest stars form a huge Latin cross.
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; Bayer designation Alpha Cygni; 1992 position R.A. 20h41.2m, Dec. +45°15'. It is a white supergiant 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.
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 A2 Ia; its intrinsic brightness (about 60,000 times as luminous as the sun) is the greatest of all the bright stars. Thus, even though it is also one of the most distant bright stars, being about 1,600 light-years from the earth, it has an 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
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 of 1.25, making it one of the 20 brightest. Its name is from the Arabic meaning "hen's tail," referring to its position in the constellation.

Deneb

(den -eb) (α Cyg) A very luminous remote white supergiant that is the brightest star in the constellation Cygnus and lies at one end of the long arm of the Northern Cross, with Albireo (β Cyg) at the other (the name Deneb is Arabic for ‘tail’). Deneb is one of the biggest and brightest stars known, with a mass at least 25 times that of the Sun. It has a luminosity of between 60 000 and 250 000 times the Sun's brightness, depending on the accuracy of our distance estimates for it. It has very low proper motion (0″.003 per year), and measurements of its very small parallax by Hipparcos suggest that it lies about 990 parsecs from the Sun, although other estimates place it 500 pc away. mv : 1.25; Mv : –7.2 or –8.6; spectral type: A2 Ia.

Deneb

[′den‚eb]
(astronomy)
A white star of spectral classification A2-Ia in the constellation Cygnus; the star α Cygni.
References in periodicals archive ?
Down to Vega's lower left, on the map and in the sky, is Deneb in Cygnus, the Swan.
Detroiter: You were just 21 when you helped found Deneb Robotics?
Simulation is process verification," explains Bob Brown, president, Deneb Robotics.
The company's significant investments in research and development have resulted in the recent introductions of new CATIA and SolidWorks product releases and the continuing extension of our product line around Enovia and Deneb.
and manufacturing-simulation software from Deneb Robotics.
Deneb Karentz of the University of California, San Francisco, lauds the Canadian team for focusing on the interactions between different ecosystem levels.
Three bright stars mark the triangle: Vega (part of Lyra, the Harp); Deneb (tail of Cygnus, the Swan); Altair (eye of Aquila, the Eagle).
1819) After a night of whisk and brag and gin and water At Rice's cardplaying club on Poland Street, Coming out before dawn under the lyric stars, Vega conspicuous at the point of the Lyre A five o'clock of a summer morning encompassing 286 square degrees of the London Arabic sky, The whole fate drama hoving into view, While the slow making of souls of overshadows Every thing--in this vale of sorrows and of The stubborn drive to find something outside The frail shell of ourselves and our concerns With which we might identify-- The burden of the mystery producing a sharp, acute Light that pierces the drawingroom, the sparring Ring and the cockpit footloose Junkets haunts, Deneb and Altair locked across the dark Sky to form the asterism known as the Summer Triangle
The rift zigzags around the northwestern side of Deneb and the North America Nebula, crosses the great 12[degrees]-long black gash of the Funnel Cloud Nebula (Le Gentil 3), and continues through Zeta ([zeta]) and Iota ([iota]) Cephei.
Contractor name : WINELANDS TEXTILES (PTY) LTD T/A BERG RIVER TEXTILES, A SUBSIDIARY OF DENEB INVESTMENTS
However, the brilliant Summer Triangle of Vega, Deneb and Altair is becoming very easy to spot in the eastern horizon.
They appear brilliant from Earth even though Rigel is about 900 light-years away and Deneb about 1,400.