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. {, class="wikitable sortable" style="font-size:90%;" , - bgcolor="#efefef" ! Star ! Constellation ! Discovery ! Maximum ( m_V) ! Minimum ( m_V) ! Range ! Period (days) ! width="8%", Spectral Type !

Type Type may refer to: Science and technology Computing * Typing, producing text via a keyboard, typewriter, etc. * Data type, collection of values used for computations. * File type * TYPE (DOS command), a command to display contents of a file. * Ty ...

! width="25%", Comment , --- , θ Aps ,

Apus Apus is a small constellation in the Southern Celestial Hemisphere, southern sky. It represents a bird-of-paradise, and its name means "without feet" in Greek language, Greek because the bird-of-paradise was once wrongly believed to lack feet. ...

, , 4^m.65 , 6^m.20 , , , M7III , SRb , , --- , β And (Mirach) , Andromeda , , 2^m.01 , 2^m.10 , , , M0IIIa , SRb , suspected , --- , Z Aqr ,

Aquarius Aquarius may refer to: Astrology * Aquarius (astrology), an astrological sign * Age of Aquarius, a time period in the cycle of astrological ages Astronomy * Aquarius (constellation) * Aquarius in Chinese astronomy Arts and entertainment ...

, , 7^m.4 , 10^m.2 , , , M1e-M7III , SRa , , --- , V Aql , Aquila , , 6^m.6 , 8^m.4 , , , C5,4-C6,4(N6) , SRb , , --- , W Boö ,

Boötes Boötes ( ) is a constellation in the northern sky, located between 0° and +60° declination, and 13 and 16 hours of right ascension on the celestial sphere. The name comes from la, Boōtēs, which comes from grc-gre, Βοώτης, Boṓtēs ...

, , 4^m.49 , 5^m.40 , , , M2-M4III , SRb: , , --- , VZ Cam ,

Camelopardalis Camelopardalis is a large but faint constellation of the northern sky representing a giraffe. The constellation was introduced in 1612 or 1613 by Petrus Plancius. Some older astronomy books give Camelopardalus or Camelopardus as alternative for ...

, , 4^m.80 , 4^m.96 , , , M4IIIa , , Lb in GCVS , --- , Y CVn (La Superba) , Canes Venatici , , 4^m.8 , 6^m.3 , , , C5,4J(N3) , SRb , one of the reddest stars visible to the unaided eye , --- , ρ Cas , Cassiopeia , L.D.Wells (1901) , 4^m.1 , 6^m.2 , , , F8pIa-K0pIa-0 , SRd , , --- , WZ Cas , Cassiopeia , , 6^m.3 , 8^m.5 , , , C9,2JLi(N1p) , SRb , Visual double star, visible through binoculars , --- , V806 Cen , Centaurus , , 4^m.16 , 4^m.26 , , , M5III , SRb , , --- , T Cen , Centaurus , , 5^m.5 , 9^m.0 , , , K0:e-M4II:e , SRa , classified as

RV Tauri variable RV Tauri variables are luminous variable stars that have distinctive light variations with alternating deep and shallow minima. History and discovery German astronomer Friedrich Wilhelm Argelander monitored the distinctive variations in brightne ...

by some , --- , V810 Cen , Centaurus , , 4^m.95 , 5^m.12 , , , F5-G0Ia-0 , SRd , B1 Iab companion , --- , μ Cep (Herschel's Garnet Star) , Cepheus , (1782) , 3^m.43 , 5^m.10 , , , M2eIa , SRc , , --- , SS Cep , Cepheus , , 6^m.5 , 7^m.7 , , , M5III , SRb , , --- , AR Cep , Cepheus , , 7^m.0 , 7^m.9 , , ~364 , M4III , SRb , , --- , T Cet , Cetus , , 4^m.96 , 6^m.90 , , , M5-6SIIe , SRc , , --- , T Cnc ,

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, Hind (1850) , 7^m.6 , 10^m.5 , , , C3,8-C5,5(R6-N6) , SRb , , --- , X Cnc ,

, , 5^m.69 , 6^m.94 , , , C5,4(N3) , SRb , , - , RR CrB , Corona Borealis , , 7^m.3 , 8^m.2 , , , M3-M6 , SRb , , --- , W Cyg , Cygnus , , 5^m.10 , 6^m.83 , , , M4e-M6e(Tc:)III , SRb , , - , AF Cyg , Cygnus , , 6^m.4 , 7^m.7 , , , M5e-M7 , SRb , , --- , U Del ,

Delphinus Delphinus (Pronounced or ) is a small constellation in the Northern Celestial Hemisphere, close to the celestial equator. Its name is the Latin Latin (, or , ) is a classical language belonging to the Italic branch of the Indo-Europea ...

, , 6^m.14 , 7^m.61 , , , M5II-III , SRb , , --- , EU Del ,

, , 5^m.79 , 6^m.9 , , , M6.4III , SRb , , --- , η Gem (Propus) ,

Gemini Gemini may refer to: Space * Gemini (constellation), one of the constellations of the zodiac ** Gemini in Chinese astronomy * Project Gemini, the second U.S. crewed spaceflight program * Gemini Observatory, consisting of telescopes in the Northern ...

Schmidt Schmidt may refer to: * Schmidt (surname), including list of people with the surname * Schmidt (singer) (born 1990), German pop and jazz singer * Schmidt (lunar crater), a small lunar impact crater * Schmidt (Martian crater), a List of craters on ...

(1865) , 3^m.15 , 3^m.90 , , , M3IIIab , SRa , also Algol eclipsing binary? , --- , α Her (Rasalgethi) ,

Hercules Hercules (, ) is the Roman equivalent of the Greek divine hero Heracles, son of Jupiter and the mortal Alcmena. In classical mythology, Hercules is famous for his strength and for his numerous far-ranging adventures. The Romans adapted the Gr ...

, (1759) , 2^m.74 , 4^m.00 , , , M5Ib-II , SRc , , --- , 30 Her ,

, , 4^m.3 , 6^m.3 , , , M6III , SRb , , --- , X Her ,

, , 5^m.8 , 7^m.0 , , , M6e , SRb , , --- , U Hya ,

Hydra Hydra generally refers to: * Lernaean Hydra, a many-headed serpent in Greek mythology * ''Hydra'' (genus), a genus of simple freshwater animals belonging to the phylum Cnidaria Hydra or The Hydra may also refer to: Astronomy * Hydra (constel ...

, , 4^m.56 , 5^m.40 , , ~450 , C6.5,3(N2)(Tc) , SRb , , --- , RX Lep , Lepus , , 5^m.0 , 7^m.4 , , ~60 , M6.2III , SRb , , --- , σ Lib (Brachium) ,

Libra Libra generally refers to: * Libra (constellation), a constellation * Libra (astrology), an astrological sign based on the star constellation Libra may also refer to: Arts and entertainment * ''Libra'' (novel), a 1988 novel by Don DeLillo Musi ...

, , 3^m.20 , 3^m.46 , , , M5III , SRb , , --- , R Lyr ,

Lyra Lyra (; Latin for lyre, from Greek ''λύρα'') is a small constellation. It is one of the 48 listed by the 2nd century astronomer Ptolemy, and is one of the modern 88 constellations recognized by the International Astronomical Union. Lyra was ...

, , 3^m.88 , 5^m.00 , , ~46 , M5III , SRb , , --- , α Ori (Betelgeuse) , Orion ,

John Herschel Sir John Frederick William Herschel, 1st Baronet (; 7 March 1792 – 11 May 1871) was an English polymath active as a mathematician, astronomer, chemist, inventor, experimental photographer who invented the blueprint and did botanical wor ...

(1840) , 0^m.0 , 1^m.3 , , , M1-M2Ia-Ibe , SRc , , --- , W Ori , Orion , , 5^m.5 , 6^m.9 , , , C5,4(N5) , SRb , , --- , CK Ori , Orion , , 5^m.9 , 7^m.1 , , ~120 , K2IIIe: , , probably not variable , --- , S Pav , Pavo , , 6^m.6 , 10^m.4 , , , M7IIe-M8III , SRa , , --- , GZ Peg ,

Pegasus Pegasus ( grc-gre, Πήγασος, Pḗgasos; la, Pegasus, Pegasos) is one of the best known creatures in Greek mythology. He is a winged divine stallion usually depicted as pure white in color. He was sired by Poseidon, in his role as hor ...

, , 4^m.95 , 5^m.23 , , , M4SIII , SRa , , --- , ρ Per ,

Perseus In Greek mythology, Perseus (Help:IPA/English, /ˈpɜːrsiəs, -sjuːs/; Greek language, Greek: Περσεύς, Romanization of Greek, translit. Perseús) is the legendary founder of Mycenae and of the Perseid dynasty. He was, alongside Cadmus ...

, , 3^m.30 , 4^m.00 , , ~50 , M4IIb-IIIa , SRb , , --- , R Pic ,

Pictor Pictor is a constellation in the Southern Celestial Hemisphere, located between the star Canopus and the Large Magellanic Cloud. Its name is Latin for Painting, painter, and is an abbreviation of the older name Equuleus Pictoris (the "painter's ...

, , 6^m.35 , 10^m.10 , , , M1IIe-M4IIe , , , --- , L² Puppis ,

Puppis Puppis is a constellation in the southern sky. Puppis, the Latin translation of "poop deck", was originally part of an over-large constellation Argo Navis (the ship of Jason and the Argonauts), which centuries after its initial description, was ...

, , 2^m.6 , 6^m.2 , , , M5IIIe-M6IIIe , SRb , , --- ,

VX Sgr VX or vx may refer to: Science and technology * VX (nerve agent), a neurotoxic chemical warfare agent ** Chinese VX, structural isomer of VX **V-sub x, another organophosphate nerve agent of the V-series * VX Nano, a brand of optical mouse by Logi ...

, Sagittarius , , 6^m.52 , 14^m.00 , , , M4eIa-M10eIa , SRc , one of the largest stars known , --- , η Scl ,

Sculptor Sculpture is the branch of the visual arts that operates in three dimensions. Sculpture is the three-dimensional art work which is physically presented in the dimensions of height, width and depth. It is one of the plastic arts. Durable sc ...

, Cousins/Stoy (1962) , 4^m.8 , 4^m.9 , , , M4IIIa , SRb , , --- , τ⁴ Ser , Serpens , , 5^m.89 , 7^m.07 , , , M5IIb-IIIa , SRb , , --- , CE Tau ,

Taurus Taurus is Latin for 'bull' and may refer to: * Taurus (astrology), the astrological sign * Taurus (constellation), one of the constellations of the zodiac * Taurus (mythology), one of two Greek mythological characters named Taurus * ''Bos taurus ...

, , 4^m.23 , 4^m.54 , , , M2Iab-Ib , SRc , , --- , SS Vir , Virgo , , 6^m.0 , 9^m.6 , , , C6,3e(Ne) , SRa , , --- , SV UMa ,

Ursa Major Ursa Major (; also known as the Great Bear) is a constellation in the northern sky, whose associated mythology likely dates back into prehistory. Its Latin name means "greater (or larger) bear," referring to and contrasting it with nearby Ursa ...

, , 9^m.1 , 10^m.6 , , , G1Ibe-K3Iap , SRd , , --- , Z UMa ,

, , 6^m.2 , 9^m.4 , , , M5IIIe , SRb , , --- , RR UMi ,

Ursa Minor Ursa Minor (Latin: 'Lesser Bear', contrasting with Ursa Major), also known as the Little Bear, is a constellation located in the far northern sky. As with the Great Bear, the tail of the Little Bear may also be seen as the handle of a ladle, h ...

, , 4^m.44 , 4^m.85 , , {{nts, 43.3 , M5III , SRb , , ---

See also