Lucian is a tiny lunar impact crater that is located in the northeastern part of the Mare Tranquillitatis. The nearest named craters are Lyell to the east-southeast, Theophrastus to the northeast, and Gardner to the north-northeast. A little farther to the north is Maraldi crater. (wikipedia entry)
A crater is a circular depression likely created by an impact event. On the Moon they are named after deceased scientists, polar explorers, astronauts or cosmonauts.
