which planet does it orbit?
Uranus.
Titania (moon)
Titania (), also designated Uranus III, is the largest of the moons of Uranus 
who discovered titania? William Herschel.
wiki:19550632
Titania (moon) [SEP] Introduction
Titania (), also designated Uranus III, is the largest of the moons of Uranus and the eighth largest moon in the Solar System at a diameter of . Discovered by William Herschel in 1787, Titania is named after the queen of the fairies in Shakespeare's "A Midsummer Night's Dream". Its orbit lies inside Uranus's magnetosphere. Titania consists of approximately equal amounts of ice and rock, and is probably differentiated into a rocky core and an icy mantle. A layer of liquid water may be present at the core–mantle boundary. The surface of Titania, which is relatively dark and slightly red in color, appears to have been shaped by both impacts and endogenic processes.