<P> The brightest star not included in the asterism and the westernmost cataloged by Bayer or Flamsteed is Kappa Lyrae, a typical red giant around 73 parsecs distant . Similar bright orange or red giants include the 4th - magnitude Theta Lyrae, Lambda Lyrae, and HD 173780 . Lambda is located just south of Gamma, Theta is positioned in the east, and HD 173780, the brightest star in the constellation with no Bayer or Flamsteed designation, is more southernly . Just north of Theta and of almost exactly the same magnitude is Eta Lyrae, a blue subgiant with a near - solar metal abundance . Also nearby is the faint HP Lyrae, a post-asymptotic giant branch (AGB) star that shows variability . The reason for its variability is still a mystery: first cataloged as an eclipsing binary, it was theorized to be an RV Tauri variable in 2002, but if so, it would be by far the hottest such variable discovered . </P> <P> In the extreme east is RR Lyrae, the prototype of the large class of variables known as RR Lyrae variables, which are pulsating variables similar to Cepheids, but are evolved population II stars of spectral types A and F. Such stars are usually not found in a galaxy's thin disk, but rather in the galactic halo . Such stars serve as standard candles, and thus are a reliable way to calculate distances to the globular clusters in which they reside . RR Lyrae itself varies between magnitudes 7 and 8 while exhibiting the Blazhko effect . The easternmost star designated by Flamsteed, 19 Lyrae, is also a small - amplitude variable, an Alpha Canum Venaticorum variable with a period of just over one day . </P> <P> Another evolved star is the naked - eye variable XY Lyrae, a red bright giant just north of Vega that varies between 6th and 7th magnitudes over a period of 120 days . Also just visible to the naked eye is the peculiar classical Cepheid V473 Lyrae . It is unique in that it is the only known Cepheid in the Milky Way to undergo periodic phase and amplitude changes, analogous to the Blazhko effect in RR Lyrae stars . At 1.5 days, its period was the shortest known for a classical Cepheid at the time of its discovery . W and S Lyrae are two of the many Mira variables in Lyra . W varies between 7th and 12th magnitudes over approximately 200 days, while S, slightly fainter, is a silicate carbon star, likely of the J - type . Another evolved star is EP Lyrae, a faint RV Tauri variable and an "extreme example" of a post-AGB star . It and a likely companion are surrounded by a circumstellar disk of material . </P> <P> Rather close to Earth at a distance of only 16 parsecs (52 ly) is Gliese 758 . The sunlike primary star has a brown dwarf companion, the coldest to have been imaged around a sunlike star in thermal light when it was discovered in 2009 . Only slightly farther away is V478 Lyrae, an eclipsing RS Canum Venaticorum variable whose primary star shows active starspot activity . </P>

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