Deneb

American  

[den-eb] / ˈdɛn ɛb /

noun

Astronomy.

1. a first-magnitude star in the constellation Cygnus.

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Deneb British  

/ ˈdɛnɛb /

noun

1. the brightest star in the constellation Cygnus and one of the brightest but remotest stars in the night sky. Visual magnitude: 1.25; spectral type: A2I

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Deneb Scientific  

/ dĕn′ĕb′ /

1. A white supergiant star. It is the brightest star in the constellation Cygnus, with an apparent magnitude of 1.26. Deneb, along with Vega and Altair, form the Summer Triangle asterism. Scientific name: Alpha Cygnus.

2. See Note at Rigel

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Etymology

Origin of Deneb

First recorded in 1865–70, Deneb is from the Arabic word dhanab a tail

Example Sentences

One of the easiest seasonal landmarks to find is the Summer Triangle, a large pattern formed by the bright stars Vega, Altair, and Deneb.

From Science Daily • Jun. 3, 2026

It all begins with the Summer Triangle, external, a bright three-cornered pattern of stars, called Vega, Deneb, and Altair.

From BBC • Jun. 5, 2025

Deneb is apparently the faintest of the stellar triangle vertices, but don’t be fooled.

From Scientific American • Jul. 14, 2023

Before he could unload the feed, a friend named Dyor Deneb approached with a wounded pigeon.

From Los Angeles Times • Oct. 1, 2022

So working out longitude requires Phobos to set, and working out latitude requires it to be night so I can sight Deneb.

From "The Martian" by Andy Weir