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List of Semiregular Variable Starsreport

  • [Star]: θ Aps
    [Constellation]: Apus
    [Discovery]:  
    [Maximum (mV)]: 4m.65
    [Minimum (mV)]: 6m.20
    [Range]: 1.55
    [Period (days)]: 119
    [Spectral Type]: M7III
    [Type]: SRb
    [Comment]:  

  • [Star]: β And (Mirach)
    [Constellation]: Andromeda
    [Discovery]:  
    [Maximum (mV)]: 2m.01
    [Minimum (mV)]: 2m.10
    [Range]: 0.09
    [Period (days)]: 119
    [Spectral Type]: M0IIIa
    [Type]: SRb
    [Comment]: suspected

  • [Star]: Z Aqr
    [Constellation]: Aquarius
    [Discovery]:  
    [Maximum (mV)]: 7m.4
    [Minimum (mV)]: 10m.2
    [Range]: 2.8
    [Period (days)]: 136.6
    [Spectral Type]: M1e-M7III
    [Type]: SRa
    [Comment]:  

  • [Star]: V Aql
    [Constellation]: Aquila
    [Discovery]:  
    [Maximum (mV)]: 6m.6
    [Minimum (mV)]: 8m.4
    [Range]: 1.8
    [Period (days)]: 353
    [Spectral Type]: C5,4-C6,4(N6)
    [Type]: SRb
    [Comment]:  

  • [Star]: W Boö
    [Constellation]: Boötes
    [Discovery]:  
    [Maximum (mV)]: 4m.49
    [Minimum (mV)]: 5m.40
    [Range]: 0.67
    [Period (days)]: 450
    [Spectral Type]: M2-M4III
    [Type]: SRb:
    [Comment]:  

  • [Star]: VZ Cam
    [Constellation]: Camelopardalis
    [Discovery]:  
    [Maximum (mV)]: 4m.80
    [Minimum (mV)]: 4m.96
    [Range]: 0.16
    [Period (days)]: 23.7
    [Spectral Type]: M4IIIa
    [Type]:
    [Comment]: Lb in GCVS

  • [Star]: Y CVn (La Superba)
    [Constellation]: Canes Venatici
    [Discovery]:  
    [Maximum (mV)]: 4m.8
    [Minimum (mV)]: 6m.3
    [Range]: 1.5
    [Period (days)]: 160
    [Spectral Type]: C5,4J(N3)
    [Type]: SRb
    [Comment]: one of the reddest stars visible to the unaided eye

  • [Star]: ρ Cas
    [Constellation]: Cassiopeia
    [Discovery]: L.D.Wells (1901)
    [Maximum (mV)]: 4m.1
    [Minimum (mV)]: 6m.2
    [Range]: 2.1
    [Period (days)]: 320
    [Spectral Type]: F8pIa-K0pIa-0
    [Type]: SRd
    [Comment]:

  • [Star]: WZ Cas
    [Constellation]: Cassiopeia
    [Discovery]:  
    [Maximum (mV)]: 6m.3
    [Minimum (mV)]: 8m.5
    [Range]: 2.2
    [Period (days)]:
    [Spectral Type]: C9,2JLi(N1p)
    [Type]: SRb
    [Comment]: Visual double star, visible through binoculars

  • [Star]: V806 Cen
    [Constellation]: Centaurus
    [Discovery]:  
    [Maximum (mV)]: 4m.16
    [Minimum (mV)]: 4m.26
    [Range]: 0.1
    [Period (days)]: 12
    [Spectral Type]: M5III
    [Type]: SRb
    [Comment]:  

  • [Star]: T Cen
    [Constellation]: Centaurus
    [Discovery]:  
    [Maximum (mV)]: 5m.5
    [Minimum (mV)]: 9m.0
    [Range]: 3.5
    [Period (days)]: 90.44
    [Spectral Type]: K0:e-M4II:e
    [Type]: SRa
    [Comment]: classified as RV Tauri variable by some

  • [Star]: V810 Cen
    [Constellation]: Centaurus
    [Discovery]:  
    [Maximum (mV)]: 4m.95
    [Minimum (mV)]: 5m.12
    [Range]: 0.17
    [Period (days)]: 130
    [Spectral Type]: F5-G0Ia-0
    [Type]: SRd
    [Comment]: B1 Iab companion

  • [Star]: μ Cep (Herschel's Garnet Star)
    [Constellation]: Cepheus
    [Discovery]: William Herschel (1782)
    [Maximum (mV)]: 3m.43
    [Minimum (mV)]: 5m.10
    [Range]: 1.67
    [Period (days)]: 730
    [Spectral Type]: M2eIa
    [Type]: SRc
    [Comment]:  

  • [Star]: SS Cep
    [Constellation]: Cepheus
    [Discovery]:  
    [Maximum (mV)]: 6m.5
    [Minimum (mV)]: 7m.7
    [Range]: 1.2
    [Period (days)]: 90
    [Spectral Type]: M5III
    [Type]: SRb
    [Comment]:  

  • [Star]: AR Cep
    [Constellation]: Cepheus
    [Discovery]:  
    [Maximum (mV)]: 7m.0
    [Minimum (mV)]: 7m.9
    [Range]: 0.9
    [Period (days)]: ~364
    [Spectral Type]: M4III
    [Type]: SRb
    [Comment]:  

  • [Star]: T Cet
    [Constellation]: Cetus
    [Discovery]:  
    [Maximum (mV)]: 4m.96
    [Minimum (mV)]: 6m.90
    [Range]: 1.94
    [Period (days)]: 159
    [Spectral Type]: M5-6SIIe
    [Type]: SRc
    [Comment]:  

  • [Star]: T Cnc
    [Constellation]: Cancer
    [Discovery]: Hind (1850)
    [Maximum (mV)]: 7m.6
    [Minimum (mV)]: 10m.5
    [Range]: 2.9
    [Period (days)]: 482
    [Spectral Type]: C3,8-C5,5(R6-N6)
    [Type]: SRb
    [Comment]:  

  • [Star]: X Cnc
    [Constellation]: Cancer
    [Discovery]:  
    [Maximum (mV)]: 5m.69
    [Minimum (mV)]: 6m.94
    [Range]: 1.25
    [Period (days)]: 180
    [Spectral Type]: C5,4(N3)
    [Type]: SRb
    [Comment]:  

  • [Star]: RR CrB
    [Constellation]: Corona Borealis
    [Discovery]:  
    [Maximum (mV)]: 7m.3
    [Minimum (mV)]: 8m.2
    [Range]: 0.9
    [Period (days)]: 60.8
    [Spectral Type]: M3-M6
    [Type]: SRb
    [Comment]:  

  • [Star]: W Cyg
    [Constellation]: Cygnus
    [Discovery]:  
    [Maximum (mV)]: 5m.10
    [Minimum (mV)]: 6m.83
    [Range]: 1.73
    [Period (days)]: 131
    [Spectral Type]: M4e-M6e(Tc:)III
    [Type]: SRb
    [Comment]:  

  • [Star]: AF Cyg
    [Constellation]: Cygnus
    [Discovery]:  
    [Maximum (mV)]: 6m.4
    [Minimum (mV)]: 7m.7
    [Range]: 1.3
    [Period (days)]: 92.5
    [Spectral Type]: M5e-M7
    [Type]: SRb
    [Comment]:  

  • [Star]: U Del
    [Constellation]: Delphinus
    [Discovery]:  
    [Maximum (mV)]: 6m.14
    [Minimum (mV)]: 7m.61
    [Range]: 1.47
    [Period (days)]: 110
    [Spectral Type]: M5II-III
    [Type]: SRb
    [Comment]:  

  • [Star]: EU Del
    [Constellation]: Delphinus
    [Discovery]:  
    [Maximum (mV)]: 5m.79
    [Minimum (mV)]: 6m.9
    [Range]: 1.11
    [Period (days)]: 59.7
    [Spectral Type]: M6.4III
    [Type]: SRb
    [Comment]:  

  • [Star]: η Gem (Propus)
    [Constellation]: Gemini
    [Discovery]: Schmidt (1865)
    [Maximum (mV)]: 3m.15
    [Minimum (mV)]: 3m.90
    [Range]: 0.75
    [Period (days)]: 233
    [Spectral Type]: M3IIIab
    [Type]: SRa
    [Comment]: also Algol eclipsing binary?

  • [Star]: α Her (Rasalgethi)
    [Constellation]: Hercules
    [Discovery]: William Herschel (1759)
    [Maximum (mV)]: 2m.74
    [Minimum (mV)]: 4m.00
    [Range]: 1.26
    [Period (days)]:
    [Spectral Type]: M5Ib-II
    [Type]: SRc
    [Comment]:  

  • [Star]: 30 Her
    [Constellation]: Hercules
    [Discovery]:  
    [Maximum (mV)]: 4m.3
    [Minimum (mV)]: 6m.3
    [Range]: 2.0
    [Period (days)]: 89.2
    [Spectral Type]: M6III
    [Type]: SRb
    [Comment]:  

  • [Star]: X Her
    [Constellation]: Hercules
    [Discovery]:  
    [Maximum (mV)]: 5m.8
    [Minimum (mV)]: 7m.0
    [Range]: 1.1
    [Period (days)]: 95.0
    [Spectral Type]: M6e
    [Type]: SRb
    [Comment]:  

  • [Star]: U Hya
    [Constellation]: Hydra
    [Discovery]:  
    [Maximum (mV)]: 4m.56
    [Minimum (mV)]: 5m.40
    [Range]: 2.4
    [Period (days)]: ~450
    [Spectral Type]: C6.5,3(N2)(Tc)
    [Type]: SRb
    [Comment]:  

  • [Star]: RX Lep
    [Constellation]: Lepus
    [Discovery]:  
    [Maximum (mV)]: 5m.0
    [Minimum (mV)]: 7m.4
    [Range]: 2.4
    [Period (days)]: ~60
    [Spectral Type]: M6.2III
    [Type]: SRb
    [Comment]:  

  • [Star]: σ Lib (Brachium)
    [Constellation]: Libra
    [Discovery]:  
    [Maximum (mV)]: 3m.20
    [Minimum (mV)]: 3m.46
    [Range]: 0.26
    [Period (days)]: 20
    [Spectral Type]: M5III
    [Type]: SRb
    [Comment]:  

  • [Star]: R Lyr
    [Constellation]: Lyra
    [Discovery]:  
    [Maximum (mV)]: 3m.88
    [Minimum (mV)]: 5m.00
    [Range]: 1.12
    [Period (days)]: ~46
    [Spectral Type]: M5III
    [Type]: SRb
    [Comment]:  

  • [Star]: α Ori (Betelgeuse)
    [Constellation]: Orion
    [Discovery]: John Herschel (1840)
    [Maximum (mV)]: 0m.0
    [Minimum (mV)]: 1m.3
    [Range]: 1.3
    [Period (days)]: 2,335
    [Spectral Type]: M1-M2Ia-Ibe
    [Type]: SRc
    [Comment]:  

  • [Star]: W Ori
    [Constellation]: Orion
    [Discovery]:  
    [Maximum (mV)]: 5m.5
    [Minimum (mV)]: 6m.9
    [Range]: 4.2
    [Period (days)]: 212
    [Spectral Type]: C5,4(N5)
    [Type]: SRb
    [Comment]:  

  • [Star]: CK Ori
    [Constellation]: Orion
    [Discovery]:  
    [Maximum (mV)]: 5m.9
    [Minimum (mV)]: 7m.1
    [Range]: 1.2
    [Period (days)]: ~120
    [Spectral Type]: K2IIIe:
    [Type]:
    [Comment]: probably not variable

  • [Star]: S Pav
    [Constellation]: Pavo
    [Discovery]:  
    [Maximum (mV)]: 6m.6
    [Minimum (mV)]: 10m.4
    [Range]: 3.8
    [Period (days)]: 381
    [Spectral Type]: M7IIe-M8III
    [Type]: SRa
    [Comment]:  

  • [Star]: GZ Peg
    [Constellation]: Pegasus
    [Discovery]:  
    [Maximum (mV)]: 4m.95
    [Minimum (mV)]: 5m.23
    [Range]: 0.28
    [Period (days)]: 92.66
    [Spectral Type]: M4SIII
    [Type]: SRa
    [Comment]:  

  • [Star]: ρ Per
    [Constellation]: Perseus
    [Discovery]:  
    [Maximum (mV)]: 3m.30
    [Minimum (mV)]: 4m.00
    [Range]: 0.70
    [Period (days)]: ~50
    [Spectral Type]: M4IIb-IIIa
    [Type]: SRb
    [Comment]:  

  • [Star]: R Pic
    [Constellation]: Pictor
    [Discovery]:  
    [Maximum (mV)]: 6m.35
    [Minimum (mV)]: 10m.10
    [Range]: 3.75
    [Period (days)]: 171
    [Spectral Type]: M1IIe-M4IIe
    [Type]:
    [Comment]:  

  • [Star]: L2 Puppis
    [Constellation]: Puppis
    [Discovery]:  
    [Maximum (mV)]: 2m.6
    [Minimum (mV)]: 6m.2
    [Range]: 3.6
    [Period (days)]: 141
    [Spectral Type]: M5IIIe-M6IIIe
    [Type]: SRb
    [Comment]:  

  • [Star]: VX Sgr
    [Constellation]: Sagittarius
    [Discovery]:  
    [Maximum (mV)]: 6m.52
    [Minimum (mV)]: 14m.00
    [Range]: 7.08
    [Period (days)]: 732
    [Spectral Type]: M4eIa-M10eIa
    [Type]: SRc
    [Comment]: one of the largest stars known

  • [Star]: η Scl
    [Constellation]: Sculptor
    [Discovery]: Cousins/Stoy (1962)
    [Maximum (mV)]: 4m.8
    [Minimum (mV)]: 4m.9
    [Range]: 0.1
    [Period (days)]:
    [Spectral Type]: M4IIIa
    [Type]: SRb
    [Comment]:  

  • [Star]: τ4 Ser
    [Constellation]: Serpens
    [Discovery]:  
    [Maximum (mV)]: 5m.89
    [Minimum (mV)]: 7m.07
    [Range]: 1.18
    [Period (days)]: 100
    [Spectral Type]: M5IIb-IIIa
    [Type]: SRb
    [Comment]:  

  • [Star]: CE Tau
    [Constellation]: Taurus
    [Discovery]:  
    [Maximum (mV)]: 4m.23
    [Minimum (mV)]: 4m.54
    [Range]: 0.31
    [Period (days)]: 165
    [Spectral Type]: M2Iab-Ib
    [Type]: SRc
    [Comment]:  

  • [Star]: SS Vir
    [Constellation]: Virgo
    [Discovery]:  
    [Maximum (mV)]: 6m.0
    [Minimum (mV)]: 9m.6
    [Range]: 3.6
    [Period (days)]: 364.14
    [Spectral Type]: C6,3e(Ne)
    [Type]: SRa
    [Comment]:

  • [Star]: SV UMa
    [Constellation]: Ursa Major
    [Discovery]:  
    [Maximum (mV)]: 9m.1
    [Minimum (mV)]: 10m.6
    [Range]: 3.2
    [Period (days)]: 76
    [Spectral Type]: G1Ibe-K3Iap
    [Type]: SRd
    [Comment]:

  • [Star]: Z UMa
    [Constellation]: Ursa Major
    [Discovery]:  
    [Maximum (mV)]: 6m.2
    [Minimum (mV)]: 9m.4
    [Range]: 3.2
    [Period (days)]: 196
    [Spectral Type]: M5IIIe
    [Type]: SRb
    [Comment]:  

  • [Star]: RR UMi
    [Constellation]: Ursa Minor
    [Discovery]:  
    [Maximum (mV)]: 4m.44
    [Minimum (mV)]: 4m.85
    [Range]: 0.41
    [Period (days)]: 43.3
    [Spectral Type]: M5III
    [Type]: SRb
    [Comment]:  

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About This Tool

Semiregular Stars Variable changes more or less every cycle. The luminosity varies from several hundred to several stars. These red giant or supergiant stars can show observable periodic and photometric changes, but with a variety of irregular or interrupted changes. So astronomers have specifically sorted and named these Semiregular Variable Stars.

The random tool collates the details of the 47 Semiregular Stars Variable for easy viewing. If you’re interested in astronomy or stars, you can see the specific star names in this generator, Constellation, for Star Finder and discovery time, maximum and minimum values, and periods of occurrence, important information related to variable stars such as Spectral Type. Pulsar variables are divided into regular, semi-regular, and irregular types for reasons related to their brightness variations.

Click the "Display All Items" button and you will get a list of semiregular variable stars.

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