Albireo

(redirected from Beta Cygni)

Albireo

(al-beer -ee-oh) (β Cyg) A beautiful double star, the second brightest star in the constellation Cygnus. The primary is an orange giant with a deep blue companion 35″ away. mv : 3.1 (A), 5.1 (B); spectral type: K5 II (A), B8 V (B).
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The beak of the Swan is marked by Beta Cygni, better known as Albireo, a lovely gold and blue pair that can be split in a small telescope at low magnification.
Many people's favorite is magnificent Albireo (Beta Cygni).
The foot of the cross, or the beak of the swan, is marked by the modestly bright, 2nd-magnitude star Albireo (Beta Cygni).
These 'classical doubles', as I would describe them, often consist of reddish primaries accompanied by bluish-green companions, of which Albireo (Beta Cygni), Almaach (Gamma Andromedae), Rasalgethi (Alpha Herculis) and 95 Herculis are prominent examples.
You could begin with Albireo (Beta Cygni) and Rasalgethi (Alpha Herculis), two of the color-contrast pairs that are very high in this sky.
I drew up a double-star list and one by one began to bag its targets: Alpha Ursae Majoris, Epsilon Bootis, Alpha Canum Venaticorum, Gamma Leonis, Beta Cygni, Alpha Herculis, Epsilon Lyrae....
Gold-and-blue Albireo (Beta Cygni) is the most famous color-contrast double star in the heavens.
I noted occasional glimpses of the first diffraction ring around the Airy disk when observing Albireo (Beta Cygni), particularly around the yellow star of this well-known colorful pair.
Beta Cygni (Albireo), at the bottom of the cross, is the star of my great-great-grandfather Sumarlidi Sumarlidason, an Icelander who traveled the globe and left in his effects a timeworn handwritten genealogy that traces back my ancestors name by name for almost 1,700 years.