V509 Cas
HIP 113561
Star
Cas
Visible
Niveau 2
Small telescope (4")
Propriétés Physiques
Magnitude
5.00
Type variable
Eclipsing Binary (Algol-type)
Type Spectral
G40
Couleur de l'Étoile
Rouge
(B-V 1.42)
Distance
1630.8 ly
Position et Identifiants
RA
23h 00m 05.1s
Dec
+56° 56' 43.0"
Constellation
Cas
HR
8752
HIP
113561
Variable ID
V509 Cas
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Visibilité
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Comparaison de taille
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Cycle de vie stellaire
Classification spectrale
Diagramme de Hertzsprung-Russell
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Spectre du corps noir
Spectre d'absorption stellaire
Spectre d'absorption simulé basé sur le type spectral. Survolez les raies pour identifier les éléments.
Notes Stellaires
SRd 4.75 - 5.50V. Spectrum variable. Variable NII emission. Probable nonradial pulsations coupled with mass loss. | Phase between V and B-V curves changed between 1980 and 1985, from half phase out of cycle to in phase. Cycles on | time scale of about a year. Bimodal radial pulsation inferred (Sheffer and Lambert 1987, PASP, 99, 1277) from analysis | of a decade of spectroscopic observations. As opposed to remarks on spectral type, the star appears to be getting | bluer (IBVS 3170), implying an increase in temperature of 800 K over the past decade.
Cep OB1.
Formerly classified G0Ia, but is intrinsically considerably brighter. Also classified F8e-KIa + BIV. According to | Morgan and Keenan (1973, ARA&A, 11, 29) spectrum has varied slowly from G0 0 to G5 0 over the last 20 years.
Image de Relevé
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