Vulpecula, constellation in the northern sky at about 20 hours right ascension and 25° north in declination. It is a faint constellation; its brightest star is Alpha Vulpeculae, with a magnitude of 4.5. Polish astronomer Johannes Hevelius invented this constellation in 1687. It originally represented a fox with a goose in its mouth, and Alpha Vulpeculae is sometimes called Anser, which is Latin for “Goose.”