G. C. Myeong (1), Vasily Belokurov (2, 3), David S. Aguado (4, 5), N. Wyn Evans (2), Nelson Caldwell (1), James Bradley (2) ((1) Harvard-Smithsonian Center for Astrophysics, (2) Institute of Astronomy, Cambridge University, (3) Center for Computational Astrophysics, Flatiron Institute, (4) Dipartimento di Fisica e Astrofisica, (5) INAF/Osservatorio Astrofisico di Arcetri)