List of semiregular variable stars

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This is a list of semiregular variable stars.

Designation (name) Constellation Discovery Apparent magnitude (Maximum)[1] Apparent magnitude (Minimum)[2] Range of magnitude Period Spectral Type Subtype Comment
Theta Apodis Apus   !B9981437020096 6m.4 (p) !B9978482377967 8m.6 (p) !B9992115426396 2.2 !B9952208765068 119 d M7 III Semiregular (SRB)  
Beta Andromedae Andromeda   !B9993018652779 2m.01 !B9992580626552 2m.10 !D0024079456086 0.09 !B9952208765068 119 d M0III Semiregular (SRB) suspected
Z Aquarii Aquarius   !B9979985199997 7m.4 (p) !B9976776122797 10m.2 !B9989703805828 2.8 !B9950829430528 136.6 d M1e-M7III Semiregular (SRA)  
V Aquilae Aquila   !B9981129303509 6m.6 !B9978717682941 8m.4 !B9994122133350 1.8 !B9941335319430 353 d CII Semiregular (SRB)  
W Bootis Boötes   !B9984460747974 4m.73 !B9983136010464 5m.4 !D0004004775665 0.67 !B9938907524172 450 d M3III Semiregular (SRB:)  
VZ Camelopardalis Camelopardalis   !B9984313840820 4m.80 !B9983985942592 4m.96 !D0018325814637 0.16 !B9968345249518 23.7 d M4IIIa Semiregular (SR)  
La Superba Canes Venatici   !B9984313840820 4m.8 !B9981594503666 6m.3 !B9995945348918 1.5 !B9949248261847 160 d C54J, C-N5, C-J4.5 Semiregular (SR) one of the reddest stars visible to the unaided eye
WZ Cassiopeiae Cassiopeia   !B9981594503666 6m.3 !B9978599338365 8m.5 !B9992115426396 2.2 CII Semiregular (SRB) Visual double star, visible through binoculars
2 Centauri Centaurus   !B9985744849257 4m.16 !B9985507308397 4m.26 !D0023025850929 0.1 !B9975150933502 12 d M4.5III Semiregular (SRB)  
S Centauri Centaurus   !B9977807965159 9m.2 (p) !B9976297562585 10m.7 (p) !B9995945348918 1.5 !B9958256127301 65 d C4,5(Nbp) Semiregular (SR)  
T Centauri Centaurus   !B9982952519077 5m.5 !B9978027754226 9m.0 !B9987472370315 3.5 !B9954953133525 90.44 d K0:e-M4II:e Semiregular (SRA) classified as RV Tauri variable by some
Mu Cephei Cepheus William Herschel, 1782 !B9987674397388 3m.43 !B9983707594602 5m.1 !B9994871763735 1.67 !B9934069554658 730 d M1I Semiregular (SRC)  
SS Cephei Cepheus   !B9979205584583 8m.0 (p) !B9977917255864 9m.1 (p) !B9999046898201 1.1 !B9955001903296 90 d Semiregular (SRB)  
AR Cephei Cepheus   !B9980540898509 7m.0 !B9979331372405 7m.9 !D0001053605156 0.9 Semiregular (SRB)  
T Ceti Cetus   !B9983985942592 4m.96 !B9980684785883 6m.90 !B9993373120269 1.94 !B9949310957977 159 d M5-6Se Semiregular (SRC)  
T Cancri Cancer Hind, 1850 !B9979718517527 7m.6 !B9976486247428 10m.5 !B9989352892630 2.9 !B9938220558859 482 d Semiregular (SRB)  
X Cancri Cancer   !B9982612897518 5m.69 !B9980626982254 6m.94 !B9997768564486 1.25 !B9948070431491 180 d C5,4(N3) Semiregular (SRB)  
RR Coronae Borealis Corona Borealis   !B9980121256518 7m.3 !B9978958658457 8m.2 !D0001053605156 0.9 !B9958924102110 60.8 d M3-M6 Semiregular (SRB)  
W Cygni Cygnus   !B9980830773878 6m.80 (B) !B9978139487232 8m.9 (B) !B9992580626552 2.1 !B9951248026767 131 d M4e-M6e(Tc:)III Semiregular (SRB)  
AF Cygni Cygnus   !B9981437020096 6m.4 !B9979587796711 7m.7 !B9997376357355 1.3 !B9954727913554 92.5 d M4-M8 Semiregular (SRB)  
U Delphini Delphinus   !B9979718517527 7m.6 (p) !B9978139487232 8m.9 (p) !B9997376357355 1.3 !B9952995196342 110 d Semiregular (SRB)  
EU Delphini Delphinus   !B9982438677084 5m.79 !B9980684785883 6m.9 !B9998956399846 1.11 !B9959106679796 59.7 d Semiregular (SRB)  
Eta Geminorum Gemini   !B9988525975471 3m.15 !B9986390234468 3m.9 !D0002876820724 0.75 !B9945489615464 233 d M3IIIab Semiregular (SRA+EA)  
Alpha Herculis (Rasalgethi) Hercules William Herschel, 1759 !B9989920420796 2m.74 !B9986137056388 4m.0 !B9997688882790 1.26 M5II Semiregular (SRC)  
30 Herculis Hercules   !B9985413849773 4m.3 !B9981594503666 6m.3 !B9993068528194 2.0 !B9955091189604 89.2 d M6III Semiregular (SRB)  
X Herculis Hercules   !B9979850969794 7m.5 (p) !B9978482377967 8m.6 (p) !B9999046898201 1.1 !B9954461231083 95.0 d Semiregular (SRB)  
U Hydrae Hydra   !B9980540898509 7m.0 (B) !B9977592903107 9m.4 (B) !B9991245312626 2.4 !B9938907524172 ~450 d C Semiregular (SRB)  
RX Leporis Lepus   !B9983905620875 5m.0 !B9979985199997 7m.4 !B9991245312626 2.4 !B9959056554377 ~60 d M6.2III Semiregular (SRB)  
R Lyrae Lyra   !B9986441648463 3m.88 !B9983905620875 5m.0 !B9998866713146 1.12 !B9961713586035 ~46 d M5III Semiregular (SRB)  
Apha Orionis (Betelgeuse) Orion John Herschel, 1840 !F 0m.0 !B9997376357355 1m.3 !B9997376357355 1.3 !B9922453683780 6.39 years M2Iab Semiregular (SRC)  
W Orionis Orion   !B9978958658457 8m.2 (p) !B9974823035273 12m.4 (p) !B9985649154747 4.2 !B9946434137253 212 d Semiregular (SRB)  
CK Orionis Orion   !B9982250476490 5m.9 !B9980399052159 7m.1 !B9998176784432 1.2 !B9952125082572 ~120 d Semiregular (SR:)  
S Pavonis Pavo   !B9981129303509 6m.6 !B9976581941938 10m.4 !B9986649989332 3.8 !B9940572006248 381 d Semiregular (SRA)  
Rho Persei Perseus   !B9988060775315 3m.30 !B9986137056388 4m.0 !D0003566749439 0.70 !B9960879769945 ~50 d M4II Semiregular (SRB)  
R Pictoris Pictor   !B9981515451870 6m.35 !B9976874645761 10m.1 !B9986782441600 3.75 !B9948583364434 171 d M1IIe-M4IIe Semiregular (SR)  
L2 Puppis Puppis   !B9990444885549 2m.6 !B9981754507079 6m.2 !B9987190661545 3.6 !B9950512401096 141 d M5IIIe Semiregular (SRB)  
VX Sagittarii Sagittarius   !B9981251256240 6m.52 !B9973609426703 14m.0 !B9980427260922 7.08 !B9934042194860 732 d M4eIa-M10eIa Semiregular (SRC) &one of the largest stars known
Eta Sculptoris Sculptor   !B9984313840820 4m.8 !B9984107647948 4m.9 !D0023025850929 0.1 M4III Semiregular (SRB)  
Tau4 Serpentis Serpens   !B9982267440023 5m.89 !B9980441395200 7m.07 !B9998344855615 1.18 !B9953948298140 100 d M5II-III Semiregular (SRB)  
SV Ursae Majoris Ursa Major   !B9977917255864 9m.1 !B9976391459988 10m.6 !B9988368491901 3.2 !B9956692666597 76 d G1Ibe-K3Iap Semiregular (SRD)
Z Ursae Majoris Ursa Major   !B9981754507079 6m.2 !B9977592903107 9m.4 !B9988368491901 3.2 !B9947218853407 196 d Semiregular (SRB)  
RR Ursae Minoris Ursa Minor   !B9985093456235 4m.44 !B9984210212950 4m.85 !D0008915981192 0.41 !B9962318473649 43.3 d M5III Semiregular (SRB)  

See also[edit]

References[edit]

  1. ^ (visual magnitude, unless marked (B) (= blue) or (p) (= photographic))
  2. ^ (visual magnitude, unless marked (B) (= blue) or (p) (= photographic))