The mother of the husband of Erato was set among the stars as what constellation?
Erato (dryad):  Erato was married to Arcas, the son of Zeus and Callisto, and bore him three sons, Azan, Apheidas, and Elatus. Callisto (mythology):  Later, just as she was about to be killed by her son when he was hunting, she was set among the stars as Ursa Major ("the Great Bear").
Ursa Major