Y Lyncis

Y Lyncis is an interesting semiregular of the SRc (supergiant) subclass with an obvious long secondary period.  While it has a primary pulsation period just over 100 days, there's a longer (and larger) periodicity over 1000 days.  Such behavior is common among this class of semiregulars, including the most prominent of the SRc stars, alpha Ori (Betelgeuse).

Y Lyn is bright enough for binoculars, and is a good target for northern hemisphere observers.