List of semiregular variable stars

This is a list of semiregular variable stars.

This is a dynamic list and may never be able to satisfy particular standards for completeness. You can help by expanding it with reliably sourced entries.

Designation (name)	Constellation	Discovery	Apparent magnitude (Maximum)[1]	Apparent magnitude (Minimum)[2]	Range of magnitude	Period	Spectral Type	Subtype	Comment
Theta Apodis	Apus		6^m.4 (p)	8^m.6 (p)	2.2	119 d	M7 III	Semiregular (SRB)
Beta Andromedae	Andromeda		2^m.01	2^m.10	0.09	119 d	M0III	Semiregular (SRB)	suspected
Z Aquarii	Aquarius		7^m.4 (p)	10^m.2	2.8	136.6 d	M1e-M7III	Semiregular (SRA)
V Aquilae	Aquila		6^m.6	8^m.4	1.8	353 d	CII	Semiregular (SRB)
W Bootis	Boötes		4^m.73	5^m.4	0.67	450 d	M3III	Semiregular (SRB:)
VZ Camelopardalis	Camelopardalis		4^m.80	4^m.96	0.16	23.7 d	M4IIIa	Semiregular (SR)
La Superba	Canes Venatici		4^m.8	6^m.3	1.5	160 d	C54J, C-N5, C-J4.5	Semiregular (SR)	one of the reddest stars visible to the unaided eye
WZ Cassiopeiae	Cassiopeia		6^m.3	8^m.5	2.2		CII	Semiregular (SRB)	Visual double star, visible through binoculars
2 Centauri	Centaurus		4^m.16	4^m.26	0.1	12 d	M4.5III	Semiregular (SRB)
S Centauri	Centaurus		9^m.2 (p)	10^m.7 (p)	1.5	65 d	C4,5(Nbp)	Semiregular (SR)
T Centauri	Centaurus		5^m.5	9^m.0	3.5	90.44 d	K0:e-M4II:e	Semiregular (SRA)	classified as RV Tauri variable by some
Mu Cephei	Cepheus	William Herschel, 1782	3^m.43	5^m.1	1.67	730 d	M1I	Semiregular (SRC)
SS Cephei	Cepheus		8^m.0 (p)	9^m.1 (p)	1.1	90 d		Semiregular (SRB)
AR Cephei	Cepheus		7^m.0	7^m.9	0.9			Semiregular (SRB)
T Ceti	Cetus		4^m.96	6^m.90	1.94	159 d	M5-6Se	Semiregular (SRC)
T Cancri	Cancer	Hind, 1850	7^m.6	10^m.5	2.9	482 d		Semiregular (SRB)
X Cancri	Cancer		5^m.69	6^m.94	1.25	180 d	C5,4(N3)	Semiregular (SRB)
RR Coronae Borealis	Corona Borealis		7^m.3	8^m.2	0.9	60.8 d	M3-M6	Semiregular (SRB)
W Cygni	Cygnus		6^m.80 (B)	8^m.9 (B)	2.1	131 d	M4e-M6e(Tc:)III	Semiregular (SRB)
AF Cygni	Cygnus		6^m.4	7^m.7	1.3	92.5 d	M4-M8	Semiregular (SRB)
U Delphini	Delphinus		7^m.6 (p)	8^m.9 (p)	1.3	110 d		Semiregular (SRB)
EU Delphini	Delphinus		5^m.79	6^m.9	1.11	59.7 d		Semiregular (SRB)
Eta Geminorum	Gemini		3^m.15	3^m.9	0.75	233 d	M3IIIab	Semiregular (SRA+EA)
Alpha Herculis (Rasalgethi)	Hercules	William Herschel, 1759	2^m.74	4^m.0	1.26		M5II	Semiregular (SRC)
30 Herculis	Hercules		4^m.3	6^m.3	2.0	89.2 d	M6III	Semiregular (SRB)
X Herculis	Hercules		7^m.5 (p)	8^m.6 (p)	1.1	95.0 d		Semiregular (SRB)
U Hydrae	Hydra		7^m.0 (B)	9^m.4 (B)	2.4	~450 d	C	Semiregular (SRB)
RX Leporis	Lepus		5^m.0	7^m.4	2.4	~60 d	M6.2III	Semiregular (SRB)
R Lyrae	Lyra		3^m.88	5^m.0	1.12	~46 d	M5III	Semiregular (SRB)
Apha Orionis (Betelgeuse)	Orion	John Herschel, 1840	0^m.0	1^m.3	1.3	6.39 years	M2Iab	Semiregular (SRC)
W Orionis	Orion		8^m.2 (p)	12^m.4 (p)	4.2	212 d		Semiregular (SRB)
CK Orionis	Orion		5^m.9	7^m.1	1.2	~120 d		Semiregular (SR:)
S Pavonis	Pavo		6^m.6	10^m.4	3.8	381 d		Semiregular (SRA)
Rho Persei	Perseus		3^m.30	4^m.0	0.70	~50 d	M4II	Semiregular (SRB)
R Pictoris	Pictor		6^m.35	10^m.1	3.75	171 d	M1IIe-M4IIe	Semiregular (SR)
L^2 Puppis	Puppis		2^m.6	6^m.2	3.6	141 d	M5IIIe	Semiregular (SRB)
VX Sagittarii	Sagittarius		6^m.52	14^m.0	7.08	732 d	M4eIa-M10eIa	Semiregular (SRC)	&one of the largest stars known
Eta Sculptoris	Sculptor		4^m.8	4^m.9	0.1		M4III	Semiregular (SRB)
SW Sculptoris	Sculptor		7^m.3	9^m.32	2.02	143.6 d		Semiregular (SRC)
Tau^4 Serpentis	Serpens		5^m.89	7^m.07	1.18	100 d	M5II-III	Semiregular (SRB)
SV Ursae Majoris	Ursa Major		9^m.1	10^m.6	3.2	76 d	G1Ibe-K3Iap	Semiregular (SRD)
Z Ursae Majoris	Ursa Major		6^m.2	9^m.4	3.2	196 d		Semiregular (SRB)
RR Ursae Minoris	Ursa Minor		4^m.44	4^m.85	0.41	43.3 d	M5III	Semiregular (SRB)

See also

• List of stars
• Variable star designation

References

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