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Hen 3-160 - the First Symbiotic Binary with Mira Variable S Star

Gromadzki, M.; Mikołajewska, J.; Iłkiewicz, K. +3 more

Hen 3-160 is reported in Belczyński et al. catalog as a symbiotic binary system with M7 giant donor. Using V- and I-band photometry collected over 20 years we have found that the giant is a Mira variable pulsating with 242.5-day period. The period-luminosity relation locates Hen 3-160 at the distance of about 9.4 kpc, and its Galactic coordinates …