[1] MIT, Dept Phys, Cambridge, MA 02139 USA
[2] MIT, Kavli Inst Astrophys & Space Res, Cambridge, MA 02139 USA
[3] Hereford Arizona Observ, Hereford, AZ 85615 USA
[4] Raemor Vista Observ, 7023 E Alhambra Dr, Sierra Vista, AZ 85650 USA
[5] Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA
[6] Boston Univ, Inst Astrophys Res, 725 Commonwealth Ave Room 506, Boston, MA 02215 USA
[7] Acton Sky Portal, 3 Concetta Circle, Acton, MA 01720 USA
[8] Vermill Cliffs Observ, 4175 E Red Cliffs Dr, Kanab, UT 84741 USA