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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.

For more information visit: http://adsabs.harvard.edu/abs/2001PASP..113..983P
Prepared By: Matthew Templeton
AAVSO 49 Bay State Rd. Cambridge, MA 02138 aavso@aavso.org 617-354-0484