Which constellation is named after a little fox?

The constellation named after a little fox is Vulpecula.

Vulpecula is a faint constellation in the northern celestial hemisphere, and its name is Latin for “little fox.” It lies within the Summer Triangle, the large asterism formed by Deneb, Vega, and Altair. Unlike those brilliant guide stars, Vulpecula has no star brighter than fourth magnitude, so it is difficult to see without dark skies.

The astronomer Johannes Hevelius introduced Vulpecula in the late 17th century. He originally depicted it as Vulpecula cum ansere, meaning “the little fox with the goose,” with a goose held in the fox’s jaws. The goose was later treated separately, but its memory survives in the name Anser, given to Alpha Vulpeculae.

Vulpecula is sometimes confused with Lupus, Lepus, or Lynx because those are also Latin-named animal constellations. Its most notable astronomical association is the first pulsar ever discovered: PSR B1919+21, detected in 1967 by Jocelyn Bell Burnell and colleagues. The constellation also contains the Dumbbell Nebula, catalogued as Messier 27.