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  1. Deneb - Wikipedia

    • Deneb is a first-magnitude blue supergiant star in the constellation of Cygnus. Deneb is one of the vertices of the asterism known as the Summer Triangle and the "head" of the Northern Cross. It is the brightest star in Cygnus and the 19th brightest star in the night sky, with an average apparent magnitude of +1.25. Deneb rivals Rigel, a closer blue super… See more

    Nomenclature

    α Cygni (Latinised to Alpha Cygni) is the star's designation given by Johann Bayer in 1603. The traditional name … See more

    Observation

    The 19th brightest star in the night sky, Deneb culminates each year on October 23 at 6 PM and September 7 at 9 PM, corresponding to summer evenings in the northern hemisphere. It never dips below the horizo… See more

    ConstellationCygnus
    Right ascension20ʰ 41ᵐ 25.9ˢ
    Declination+45° 16′ 49″
    Apparent magnitude (V)1.25 (1.21–1.29)
    Physical characteristics

    Deneb's adopted distance from the Earth is around 802 parsecs (2,620 ly). This is based on the distance to the Cygnus OB7 association. Another distance estimate using its bolometric magnitude implied by its effective te… See more

    Etymology and cultural significance

    Names similar to Deneb have been given to at least seven different stars, most notably Deneb Kaitos, the brightest star in the constellation of Cetus; Deneb Algedi, the brightest star in Capricornus; and Denebola, the second … See more

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