660 Crescentia is a minor planet orbiting the Sun that was discovered by American astronomer Joel Hastings Metcalf on January 8, 1908.
Joel Metcalf of Taunton (Massachusetts) discovered six asteroids with unexplained names, though listed in Lutz Schmadel's book.
Ting used an on-line planetarium website to help with the location of some of the planets, playing back to the night of discovery.
He noticed that there was a crescent moon (33%) low in the western sky and wonders if the Rev.
Crescentia is a member of the dynamic Maria family of asteroids that most likely formed as the result of a collisional breakup of a parent body.