Editing Semiregular variable star (section)

==Bright examples==
[[Eta Geminorum|η Gem]] is the brightest SRa variable, and also an eclipsing binary. [[57 Pegasi|GZ Peg]] is an SRa variable and [[S-type star]] with a maximum magnitude of 4.95.  [[T Centauri|T Cen]] is listed as the next-brightest SRa example,<ref name=GCVS/> but it is suggested that it may actually be an [[RV Tauri variable]], which would make it by far the brightest member of that class.<ref name=vsx/>

There are numerous naked-eye SRb stars, with third-magnitude [[L2 Puppis|L<sup>2</sup> Pup]] being the brightest listed in the GCVS.  [[Sigma Librae|σ Lib]] and [[Rho Persei|ρ Per]] are also third-magnitude SRb stars at maximum brightness.  [[Beta Gruis|β Gru]] is a second magnitude star classified as a [[slow irregular variable]] by the GCVS, but reported to be of SRb type by later research.<ref name=jaavso/>  These four are all class M giants, although some SRb variables are [[carbon star]]s such as [[UU Aurigae|UU Aur]] or S-type stars such as [[Pi1 Gruis|Pi<sup>1</sup> Gru]].<ref name=GCVS/>

Catalogued SRc stars are less numerous, but include some of the brightest stars in the sky such as [[Betelgeuse]] and [[alpha Herculis|α Her]].  Although SRc stars are defined as being supergiants, a number of them have giant spectral [[luminosity class]]es and some such as α Her are known to be [[asymptotic giant branch]] stars.<ref name=GCVS/>

Many SRd stars are extremely luminous [[hypergiant]]s, including the naked-eye [[Rho Cassiopeiae|ρ Cas]], [[V509 Cassiopeiae|V509 Cas]], and [[Omicron1 Centauri|ο<sup>1</sup> Cen]].  Others are classified as giant stars, but the brightest example is the seventh-magnitude [[LU Aquarii|LU Aqr]].<ref name=GCVS/>

Most SRS variables have been discovered in deep large-scale surveys, but the naked-eye stars [[V428 Andromedae|V428 And]], [[AV Arietis|AV Ari]], and [[57 Piscium|EL Psc]] are also members.<ref name=GCVS/>