Variable Stars - SY Mus
Type Z Andromedae type AAVSO Legacy Cataclysmic Variable Programme Symbiotic variables of the Z Andromedae type. They are close binaries consisting of a hot star, a star of late type, and an extended envelope excited by the hot star's radiation. The combined brightness displays irregular variations with amplitudes up to 4 mag. in V. A very inhomogeneous group of objects. Semi-regular variables, which are giants or supergiants of intermediate and late spectral types showing noticeable periodicity in their light changes, accompanied or sometimes interrupted by various irregularities. Periods lie in the range from 20 to >2000 days, while the shapes of the light curves are rather different and variable, and the amplitudes may be from several hundredths to several magnitudes (usually 1-2 mag. in V)
Hills Observatory: 1 January 2013 to 4 November 2018
COMETS COMETS
DEEP SKY DEEP SKY