Brightness measurements from SuperWASP and KELT showed two similar reductions in brightness in November 2008 and January 2011, both with a maximal luminosity reduction of 30% and a duration of 25 days.
來自SuperWASP和KELT（英语：Kilodegree Extremely Little Telescope）的光度測量，在2008年11月和2011年1月有兩個相似的下降，兩次的最大光度降低30%並持續了25天。