Image: Wikimedia Commons

Summer Triangle

Asterism

Instance of: asterism
, triad

Overview

From Wikipedia, the free encyclopedia · Read full article · Text CC BY-SA 4.0

The Summer Triangle is an astronomical asterism in the northern celestial hemisphere. Its defining vertices form a triangle and are Altair, Deneb, and Vega, each the brightest star of its constellation. The greatest declination is +45° and the lowest is +9°, meaning the three stars can be seen from all parts of the Northern Hemisphere and from much of the Southern Hemisphere. The stars in Aquila and Cygnus represent the head of an eagle and tail of a swan, respectively, which appear inscribed within the triangle and form its altitude of the triangle. Two small constellations, Sagitta and Vulpecula, lie between Aquila in the south of the triangle and Cygnus and Lyra to the north.

Overview

All data

12 statements · 8% with external sources · numbers in brackets are citations

Members / parts: Vega
Deneb
Altair
Shape: triangle

On other databases

8 identifiers linking Summer Triangle across the web's reference databases

Data quality

statements

externally sourced

Source last edited July 10, 2026. AIDB refreshes this page daily.

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AIDB. (2026). Summer Triangle (Q324113). Retrieved from https://aidb.si/e/summer-triangle-Q324113