Determination of membership of the open cluster M 67

Abstract Using the relative proper motions of 1,067 stars in the region of the open cluster M67, we calculated the membership probability for each star by a maximum liklihood method. 375 stars were found to have probabilities greater than 0.65 and these were taken to be members. A discriminating analysis gave 412 members. Some comparison with Sanders' (1976) calculation is made.