Alpha Cygni star
A type of supergiant pulsating variable star, of spectral type A or B, that undergoes non-radial pulsations with a period of 5 to 10 days and a visual amplitude of 0.
Alpha Cygni is known as Deneb, from Al Dhanab al Dajajah (the Hen's Tail). It marks the tail of the swan.
DENEB (Alpha Cygni). One of the truly great stars of our Galaxy, a class A (A2) supergiant, Deneb serves a three-fold role among the constellations. Its very name tells the first.
These are usually red supergiants with little or no periodicity. They are often poorly studied semiregular variables that, upon closer scrutiny, should be reclassified.
Alpha Cygni variables ...
Nonradial pulsators
Nonradial pulsators display periodical deformations of the spherical shape. For example, the surface of the star may oscillate between several ellipsoidal shapes.
= Alpha Cygni variables
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Deneb (which means "tail" in Arabic) is the brightest star in the constellation Cygnus (the swan); Deneb is also referred to as alpha Cygni, and is the tail of the swan. This young, bright, blue supergiant star is about 1,500 light years away.
(dn´b), brightest star in the constellation Cygnus; Bayer designation Alpha Cygni; 1992 position R.A. 20h41.2m, Dec. +45°15&minut;.
For instance, the brightest star in the constellation of Cygnus (the Swan) is given the name Alpha Cygni, the second brightest Beta Cygni and so on, until one runs out of Greek letters that is, then its on to Roman Numerals.
The brightest star in Cygnus is [3967] alpha Cygni or Deneb ("the tail"), which is also the 19th brightest star in the sky.
Deneb Alpha Cygni
Deneb Algedi Delta Capricorni
Deneb Dulfim Epsilon Delphini
Deneb el Okab Zeta Aquilae
Deneb Kaitos Beta Ceti
Deneb Kaitos Schemali Iota Ceti
Denebola Beta Leonis
Dheneb Eta Ceti
Diadem Alpha Comae Berenices
Diphda Beta Ceti ...
The axis of Mars does not point toward Polaris, our North Star, but is displaced about 40° towards Alpha Cygni.
Many of the stars also have common names as well e.g. Alpha Cygni is better known as Deneb. A few of the more famous constellations are: Ursa Major - the Bear / the Big Dipper, Orion - the Hunter, Cassiopeia - the W shape, and the Southern Cross.
Deneb (which means "tail" in Arabic) is the brightest star in the called (the swan); Deneb is also referred to as alpha Cygni, and is the tail of the swan. This young, bright, blue supergiant star is about 1,500 light years away.
Deneb Cygni; Deneb el Adige; Arided; Aridif; Gallina; Arrioph.
Alpha Cygni
HR 7924
HD 197345 ...
The star is the lower right member (18:36:56.34+38:47:01.29, ICRS 2000.0) of the "Summer Triangle" of first magnitude stars viewed from the northern hemisphere, formed with Altair (Alpha Aquilae) at the lower left, and Deneb (Alpha Cygni) at upper ...
It is also known as the Northern Cross. It is seen along the Milky Way in the northern hemisphere. At its tail is the very bright star Deneb, (alpha Cygni) and at its head is the double star Albireo, (beta Cygni).
 See also: Star, Sky, Light, Deneb, Constellation
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