Wiktionary
n. (context star English) A binary star in the constellation Cygnus; Beta (β) Cygni.
Wikipedia
Albireo (β Cyg, β Cygni, Beta Cyg, Beta Cygni) is the fifth brightest star in the constellation Cygnus. Although it has the Bayer designation beta, it is fainter than Gamma Cygni, Delta Cygni, and Epsilon Cygni. Albireo appears to the naked eye to be a single star of magnitude 3 but through a telescope, even low magnification views resolve it into a double star. The brighter yellow star (actually itself a very close binary system) makes a striking colour contrast with its fainter blue companion star.
Usage examples of "albireo".
These were creatures native to the caverns of Albireo Seven's moon: a docile race, both playful and affectionate, which after several thousand years of selec tive breeding had become sylphs of piquant beauty.
Pchak was in the viewing room, studying the Albireo language preexamining that double-star system's war history.