  This paper presents V- and g'-band observations of the F2V star KIC 8462852,
which exhibited enigmatic fade patterns in Kepler mission data. We introduce a
transit simulation model for interpretation of these fades, and use it to
interpret an August 2017 dip as a repeat of the Kepler day 1540 dip (D1540). We
suggest the August 2017 and D1540 dips may be caused by a brown dwarf and an
associated ring system in a 1601-day elliptical orbit. Transiting icy moons of
the proposed brown dwarf, sublimating near periapsis like comets, could provide
an explanation for the significant dips observed by Kepler, as well as the
recent May to October 2017 dips and the long term variation in flux detected by
Simon et al. (2017). Whereas the presence of such a ring structure is
attractive for its ability to explain short term fade events, we do not address
how such a ring system can be created and maintained. If our speculation is
correct, a brightening of about 1-2 percent should occur during October to
November 2017. In addition, this scenario predicts that a set of dimming
events, similar to those in 2013 (Kepler) and in 2017 (reported here), can be
expected to repeat during October 2021 to January 2022 and a repeat of D1540
should occur on 27 December 2021.
