Albireo, Beta Cygni, is the star located at the base of the Northern Cross. The Albireo / æ l ˈ b ɪr i oʊ / system is a double star designated Beta Cygni (β Cygni, abbreviated Beta Cyg, β Cyg).The International Astronomical Union uses the name "Albireo" specifically for the brightest star in the system. It is often referred to as “the beak star. No change in position angle or separation has occurred between observations. Other articles where Albireo is discussed: astronomical map: Star names and designations: A conspicuous exception is Albireo in Cygnus, possibly a corruption of the words ab ireo in the first Latin edition of the Almagest in 1515. The star marking this point is known as Albireo, and is largely regarded as the most beautiful double star in the heavens. +2.9) and the lone star that marks the head of "the Swan" constellation.When viewed through small scopes - or even good 10x50 binoculars - it splits into two components. Albireo, also designated as β1 Cygni (beta1 Cygni), is a variable and multiple bright giant star in the constellation of Cygnus. The nebula has the designation IC 1318. The swan's head, or top of the cross, is a star called Albireo. Sadr, designated as Gamma Cygni, is a star located in the northern constellation of Cygnus, forming the intersection of an asterism of five stars called the Northern Cross. At 380 light years distant, the two bright stars of Albireo are comparatively far from each other and take about 75,000 years to complete a single orbit. Only 11th-magnitude Albireo C has shifted a bit in the past 68 years, but it appears the star is leaving Albireo A behind, so is likely unrelated. The two stars which make up Mizar itself are almost equal in brightness (2.3 and 3.8 magnitude) and colour. It also represents the Swan’s beak. With a distance of 380 light-years from Earth, Beta Cygni acts as the head of the swan within the constellation. The stars labeled D through L appear to be faint, unrelated field stars. Most star names are in fact Arabic and are frequently derived from translations of the Greek descriptions. The other double star we're going to look at, Albireo… The brighter star of Albireo (or Beta Cygni) is magnitude 3.1, and the dimmer is magnitude 5.1. Albireo. The stars of Orion illustrate the various… Albireo. Albireo is a showpiece double star and one of the great small telescope objects. Albireo visual magnitude is 3.08. Beta Cygni or as it’s known more traditionally, Albireo is a binary star system within the constellation. Albireo is composed of a yellow star with an apparent magnitude of 3.18, which is in fact itself a close binary star, and a fainter blue companion star with an apparent magnitude of 5.82. Such is the case of the bright double star Albireo. To the naked eye, it's the fifth brightest star in Cygnus (combined mag. A larger yellow star and smaller blue star are easily divided in a small telescope. The components are located 35 arc seconds apart. The contrast between the stars makes Albireo a pretty popular target among amateur astronomers. The star’s name is derived from the Arabic word şadr, meaning “chest.” Sadr is surrounded by a diffuse nebula called the Sadr region or the Gamma Cygni region. Seen at even slight magnification, Albireo unfolds from a bright single point into a beautiful double star of strikingly different colors. Key Facts & Summary Sadr is located at around 1,800 light-years / 560 parsecs away from the Sun. Albireo Also known as Beta Cygni, Albeiro is a double star located around 430 light years from Earth, double stars are two stars that appear close to each other from Earth but may actually be separated by a large distance, the larger of the two stars is an orange giant with a radius around 70 times that of the sun. 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