ĭn-errans, tis, adj.,
not wandering , immovable , fixed; of the fixed stars: stellae eae, quae inerrantes vocantur, Cic. N. D. 2, 21, 54; 3, 20, 51; Lact. 2, 5, 18.
in-errāns tis, adj.,not wandering, fixed: stellae. ...
An Elementary Latin Dictionary