[AAVSO LightCurve, 1yr]
[AAVSO LightCurve, 5yr]
GCVS data:
Epoch 2000: ra = 15.577, dec = 81.876
Variability type: EA/SD
Spectral type: B7Ve+G8III-IV
GCVS remarks:
VB A (B 11.83m, 13.9", 62deg; C 12.3m, 23.0", 318deg). 0.010P <= d <= 0.040P. Min II 6.93. P var. Min I = 2407890.3346 + 2.4928551d*E + 5.15d*10**(-9)*E**2 (JD2388855 - 2440790) [06468]; analysis of period variations in this interval see also in [07395]; Min I = 2441395.3604 + 2.4931048d*E (JD2440790 - 41600); Min I = 2441679.5716 + 2.4930432d*E (JD2441600 - 950); Min I = 2443753.7982 + 2.4930679d*E (JD2442100 - 43800); since JD2444000 - see Table. Shape of the light curve and depth of minima vary. Brightness of the secondary (G8) varies sporadically. Subgiant brightening accompanies eruptive mass transfer. The gaseous stream moving to the primary (B7) component forms around it gaseous ring or disc [08889].
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