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Deneb
Sign in to saveAlso known as Alpha Cygni, 50 Cygni, α Cygni, α Cyg, 50 Cyg, HD 197345, HIP 102098, HR 7924
Deneb () is a blue supergiant star in the constellation of Cygnus. It is the brightest star in the constellation and the 19th brightest in the night sky, with an apparent magnitude slightly varying between +1.21 and +1.29. Deneb is one of the vertices of the asterism known as the Summer Triangle and the "head" of the Northern Cross. Its Bayer designation is α Cygni, which is Latinised to Alpha Cygni, abbreviated to Alpha Cyg or α Cyg.
Deneb is a bright blue supergiant star located in the constellation Cygnus that ranks as the 19th brightest star visible from Earth. It holds significance as a key landmark in the night sky, forming one corner of the asterism called the Summer Triangle and marking the "head" of the Northern Cross pattern.
AI-generated from the Wikipedia summary — may contain errors.
Wikidata facts
- Distance from Earth
- 1640
- Radius
- 203
- Mass
- 21
- Image
- Deneb Sun comparison.svg
Show 17 more facts
- catalog code
- UBV M 25099
- Commons category
- Deneb
- spectral class
- A2p
- apparent magnitude
- 0.88
- metallicity
- 0.23
- parallax
- 2.31
- absolute magnitude
- -6.9
- luminosity
- 210000
- Commons gallery
- Deneb
- right ascension
- 310.357979753
- declination
- 45.280338807
- effective temperature
- 8000
- radial velocity
- -6.8
- stellar rotational velocity
- 43.0
- surface gravity
- 13.5
- right ascension component of proper motion
- 2
- declination component of proper motion
- 2
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~11 min read
Article
10 sectionsContents
- Nomenclature
- Observation
- Pole star
- Physical characteristics
- Evolutionary state
- Variable star
- Possible spectroscopic companion
- Etymology and cultural significance
- Namesakes
- References
Deneb () is a blue supergiant star in the constellation of Cygnus. It is the brightest star in the constellation and the 19th brightest in the night sky, with an apparent magnitude slightly varying between +1.21 and +1.29. Deneb is one of the vertices of the asterism known as the Summer Triangle and the "head" of the Northern Cross. Its Bayer designation is α Cygni, which is Latinised to Alpha Cygni, abbreviated to Alpha Cyg or α Cyg.
Deneb rivals Rigel, a closer blue supergiant, as the most luminous first-magnitude star. However, its distance, and hence luminosity, is poorly known; its luminosity is estimated to be between 55,000 and 196,000 times that of the Sun. Distance estimates range from 1,400 to 2,600 light-years; assuming its highest value, it is the farthest star with an apparent magnitude brighter than 2.50.