Slow irregular variable

A slow irregular variable (ascribed the GCVS types L, LB and LC) is a variable star that exhibit no or very poorly defined periodicity in their slowly changing light emissions. These stars have often been little-studied, and once more is learnt about them, they are reclassified into other categories such as semiregular variables.

Most of irregular variables are cool stars of late spectral types K and M, S stars or carbon stars. They are divided into LB:s, which are generally giants, and LC:s—supergiants exhibiting a light variation interval of about 1 magnitude.^[1]

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.

^[2]

Designation (name)	Constellation	Discovery	Apparent magnitude (Maximum)[3]	Apparent magnitude (Minimum)[3]	Range of magnitude	Spectral type	Subtype	Comment
U Antliae	Antlia		8^m.1 (p)	9^m.7 (p)	1.6	N:v	LB
Beta Pegasi	Pegasus	Schmidt, 1847	2^m.31	2^m.74	0.43	M2.3 II-III	LB
Epsilon Pegasi (Enif)	Pegasus		0^m.7	3^m.5	2.8	K2 Ib	LC
TX Piscium	Pisces		4^m.79	5^m.20	0.42	C5III	LB
Alpha Scorpii (Antares)	Scorpius		0^m.88	1^m.16	0.28	M1.5Iab-b	LC
Alpha Tauri (Aldebaran)	Taurus		0^m.75	0^m.95	0.20	K5III	LB
Mu Geminorum	Gemini		2^m.75	3^m.02	0.28	M3III	LB
BE Camelopardalis	Camelopardalis		4^m.35	4^m.48	0.13	M2II	LC
Tau^4 Eridani	Eridanus		3^m.57	3^m.72	0.15	M3III	LB
13 Boötis	Bootes		5^m.29	5^m.38	0.09	M2IIIab	LB
Psi Virginis	Virgo		4^m.73	4^m.96	0.23	M3III	LB
V854 Arae	Ara		5^m.84	5^m.99	0.12	M1.5III	LB
62 Sagittarii	Sagittarius		4^m.45	4^m.62	0.17	M4III	LB
TX Piscium	Pisces		4^m.79	5^m.20	0.41	C5III	LB
CQ Camelopardalis	Camelopardalis		5^m.15	5^m.27	0.12	M0II	LC
Pi Aurigae	Auriga		4^m.24	4^m.34	0.10	M3.5II	LC
NO Aurigae	Auriga		6^m.06	6^m.44	0.58	M2Iab	LC
Omicron1 Canis Majoris	Canis Major		3^m.78	3^m.99	0.21	M2.5Iab	LC
Sigma Canis Majoris	Canis Major		3^m.43	3^m.51	0.08	M1.5Iab	LC
NS Puppis	Puppis		4^m.4	4^m.5	0.1	K3Ib	LC
Lambda Velorum	Vela		2^m.14	2^m.30	0.16	K4Ib-IIa	LC
V337 Carinae	Carina		3^m.36	3^m.44	0.08	K3II	LC
GZ Velorum	Vela		3^m.43	3^m.81	0.38	K3II	LC
RX Telescopii	Telescopium		6^m.6	7^m.4	0.8	M3Iab	LC

References

1. GCVS Variability Types
2. Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S 1: 02025. Bibcode:2009yCat....102025S.
3. (visual magnitude, unless marked (B) (= blue) or (p) (= photographic))

External links