e/SS Cygni

Information
has gloss	eng: SS Cygni is a variable star in the northern constellation Cygnus (the Swan). It is classified as a dwarf nova, meaning that it undergoes frequent and regular brightness outbursts - every 7 or 8 weeks in the case of this much-observed example. SS Cygni is often classified as a U Geminorum type dwarf nova. However, the maxima of SS Cygni are typically brighter than those of U Gem, rising from 12th magnitude to 8th magnitude for, typically, 1–2 days. The northerly declination of SS Cygni (44N) makes the star is almost circumpolar from European and North American latitudes, allowing a large proportion of the world's amateur astronomers to monitor its behaviour. Furthermore, since the star lies against the rich backdrop of the Milky Way band, the telescope field of view around SS Cygni contains an abundance of useful brightness comparison stars.
lexicalization	eng: SS Cygni
instance of	(noun) a star that varies noticeably in brightness variable star, variable