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Semiregular variable star

In astronomy, a semiregular variable star, a type of variable star, is a giant or supergiant of intermediate and late (cooler) spectral type. It shows considerable periodicity in its light changes, accompanied or sometimes interrupted by various irregularities. Periods lie in the range from 20 to more than 2000 days, while the shapes of the light curves…

Bright examples, Pulsation & Classification

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Classification

Pulsation

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Semiregular variable star

Nodes49
Edges48
Triples25
Avg. degree1.96
Density0.040816
Components1

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Semiregular variable star

Top relations

related to Pulsation · 9
Semiregular variable star → In, Large Magellanic Cloud, Mira, OGLE, OSARG, Photometric, SRa, SRb, The
related to Classification · 7
Semiregular variable star → GCVS, IAU, International Astronomical Union, The, The General Catalogue, Variable Stars, Vul
see also · 1
Semiregular variable star → List

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Important terminology

stars variable variables semiregular giant srb brightest star light may also sra amplitudes four many related main gcvs mira pulsating

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
S Vul have been re-classifiedinstance ofhas updated the definitions with some additional information and provided newer reference stars where old examples0.80text
Pi1 Gru.Catalogued SRc stars are less numerousinstance ofalthough some SRb variables are carbon stars such as UU Aur or S-type stars0.80text
but include some of the brightest stars in the sky such as Betelgeuseinstance ofalthough some SRb variables are carbon stars such as UU Aur or S-type stars0.80text
α Herinstance ofalthough some SRb variables are carbon stars such as UU Aur or S-type stars0.80text
α Her are known to be asymptotic giant branch stars.Many SRd stars are extremely luminous hypergiantsinstance ofa number of them have giant spectral luminosity classes and some0.80text
including the naked-eye ρ Casinstance ofa number of them have giant spectral luminosity classes and some0.80text
V509 Casinstance ofa number of them have giant spectral luminosity classes and some0.80text
and ο1 Ceninstance ofa number of them have giant spectral luminosity classes and some0.80text
Semiregular variable starrelated to ClassificationThe0.60section
Semiregular variable starrelated to ClassificationInternational Astronomical Union0.60section
Semiregular variable starrelated to ClassificationIAU0.60section
Semiregular variable starrelated to ClassificationThe General Catalogue0.60section

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