Constraining the period of the ringed secondary companion to the young star J1407 with photographic plates

R. T. Mentel, M. A. Kenworthy, D. A. Cameron +13

Context. The 16 Myr old star 1SWASP J140747.93-394542.6 (V1400 Cen) underwent a series of complex eclipses in May 2007, interpreted as the transit of a giant Hill sphere filling de…