1 And
HIP 113726; 1 And
DoubleStar
And
Visible
Niveau 5
Expert level - Requires steady seeing
Propriétés Physiques
Magnitude
3.62
Type variable
Gamma Cassiopeiae (Eruptive Be Star)
Type Spectral
B6III
Couleur de l'Étoile
Bleu-blanc
(B-V -0.09)
Distance
676.5 ly
Position et Identifiants
RA
23h 01m 55.3s
Dec
+42° 19' 34.0"
Constellation
And
HR
8762
HIP
113726
Flamsteed
1 And
Variable ID
Omi And
Interrogation du catalogue VizieR...
Visibilité
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Système Stellaire Multiple
Composantes
4
IDs des Composantes
S
Séparation
0.2″
Mag du Compagnon
6.0
Type Sp. du Compagnon
A2
Angle de Position
177°
Couleurs des Étoiles
A: Bleu-blanc
B: Blanc
Découvreur
WRH 37
Vue à l'Oculaire
80x
Dawes: 1.9″
TFOV: 0.6°
Réaliste = taille angulaire réelle
Sep: 0.2″ · PA: 177° · N en haut, E à gauche
Non résolue · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 3.1″
Comparaison de taille
Interrogation de VizieR pour les données stellaires…
Cycle de vie stellaire
Classification spectrale
Diagramme de Hertzsprung-Russell
Chargement du diagramme HR…
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
Gamma Cas 3.58 - 3.65V. Photometric investigations have indicated numerous periods, particularly 0.78823, 1.0815d and | 1.5998398d, all doubtful. Form of light curve varies. Probably not an eclipsing binary. Period shell phenomena about | 23.5y. Shell features have vanished several times since 1897. H gamma varies in 3.66?d.
Separate speckle interferometric measures give sep. 0.05" (Aa) and 0.34" (AB). Ten years of observations reveal steady | change in AB position angle of about 10d with decrease in separation from about 0.375" to 0.266". Component B | identified as SB2 (see SB remarks), making total number of components at least 4.
Speckle interferometry indicates triple star. SB periods 72.3145, 8585 or 9478d. Also short period 1.5845, 0.84, | 3.66 or 1.67458d, all doubtful. Observations by Hill et al. (1988, PASP, 100, 243) indicate that one of the companions | of A is SB2, and they identify this as component B. Orbit for B: 33.01d, V0 -14.3k/s, K1 54.8k/s, K2 | 71.6k/s, m1sin3i 3.74, m2sin3i 2.86, a1sini 0.161, a2sini 0.211.
In reflection nebula; probably but not certainly associated.
Shell star. Also classified B5III or B6IVpe.
23.5y. vsini about 300k/s.
Image de Relevé
Chargement de l'image de relevé…