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R Lyrae
R Lyrae is a 4th magnitude star in the constellation Lyra, approximately 350 light years away from Earth. It is a red giant star of the spectral type M5III, meaning it has a surface temperature of under 3,500 kelvins. It is much larger and brighter, yet cooler, than our Sun. It is a semiregular pulsating star.〔 It is unusual in that it is a red star with a high proper motion (greater than 50 milliarcseconds a year). In the near-infrared J band, it is brighter than Vega. ==References==
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