List of semiregular variable stars

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This is a list of semiregular variable stars. Variability ranges are taken from the General Catalogue of Variable Stars (GCVS) where these are visual magnitudes, otherwise from the International Variable Star Index (VSX). Spectral types are taken from the GCVS, which may differ from more recent MK spectral types but often defines a range.

StarConstellationDiscoveryMaximum (mV)Minimum (mV)RangePeriod (days)Spectral Type Type Comment
θ Aps Apus  1.55119M7IIISRb 
β And (Mirach) Andromeda  0.09119M0IIIaSRbsuspected
Z Aqr Aquarius  2.8136.6M1e-M7IIISRa 
V Aql Aquila  1.8353C5,4-C6,4(N6)SRb 
W Boö Boötes  0.67450M2-M4IIISRb: 
VZ Cam Camelopardalis  0.1623.7M4IIIa Lb in GCVS
Y CVn (La Superba) Canes Venatici  1.5160C5,4J(N3)SRbone of the reddest stars visible to the unaided eye
ρ Cas Cassiopeia L.D.Wells (1901)2.1320F8pIa-K0pIa-0SRd
WZ Cas Cassiopeia  2.2C9,2JLi(N1p)SRbVisual double star, visible through binoculars
V806 Cen Centaurus  0.112M5IIISRb 
T Cen Centaurus  3.590.44K0:e-M4II:eSRaclassified as RV Tauri variable by some
V810 Cen Centaurus  0.17130F5-G0Ia-0SRdB1 Iab companion
μ Cep (Herschel's Garnet Star) Cepheus William Herschel (1782)1.67730M2eIaSRc 
SS Cep Cepheus  1.290M5IIISRb 
AR Cep Cepheus  0.9M4IIISRb 
T Cet Cetus  1.94159M5-6SIIeSRc 
T Cnc Cancer Hind (1850)2.9482C3,8-C5,5(R6-N6)SRb 
X Cnc Cancer  1.25180C5,4(N3)SRb 
RR CrB Corona Borealis  0.960.8M3-M6SRb 
W Cyg Cygnus  1.73131M4e-M6e(Tc:)IIISRb 
AF Cyg Cygnus  1.392.5M5e-M7SRb 
U Del Delphinus  1.47110M5II-IIISRb 
EU Del Delphinus  1.1159.7M6.4IIISRb 
η Gem (Propus) Gemini Schmidt (1865)0.75233M3IIIabSRaalso Algol eclipsing binary?
α Her (Rasalgethi) Hercules William Herschel (1759)1.26M5Ib-IISRc 
30 Her Hercules  2.089.2M6IIISRb 
X Her Hercules  1.195.0M6eSRb 
U Hya Hydra  2.4C6.5,3(N2)(Tc)SRb 
RX Lep Lepus  2.4M6.2IIISRb 
σ Lib (Brachium) Libra  0.2620M5IIISRb 
R Lyr Lyra  1.12M5IIISRb 
α Ori (Betelgeuse) Orion John Herschel (1840)1.32,335M1-M2Ia-IbeSRc 
W Ori Orion  4.2212C5,4(N5)SRb 
CK Ori Orion  1.2K2IIIe:probably not variable
S Pav Pavo  3.8381M7IIe-M8IIISRa 
GZ Peg Pegasus  0.2892.66M4SIIISRa 
ρ Per Perseus  0.70M4IIb-IIIaSRb 
R Pic Pictor  3.75171M1IIe-M4IIe 
L2 Puppis Puppis  3.6141M5IIIe-M6IIIeSRb 
VX Sgr Sagittarius  7.08732M4eIa-M10eIaSRcone of the largest stars known
η Scl Sculptor Cousins/Stoy (1962)0.1M4IIIaSRb 
τ4 Ser Serpens  1.18100M5IIb-IIIaSRb 
CE Tau Taurus  0.31165M2Iab-IbSRc 
SS Vir Virgo  3.6364.14C6,3e(Ne)SRa
SV UMa Ursa Major  3.276G1Ibe-K3IapSRd
Z UMa Ursa Major  3.2196M5IIIeSRb 
RR UMi Ursa Minor  0.4143.3M5IIISRb 

See also