In 2010, November the red wing of the HII shell around the supergiant F star has reappeared, uncovered by the secondary object. This return make the inside bottom Ha bump disappeared and some unexpected bumps appeared in the sodium doublet in December,...

Hello, recently the pre main double star Z cma showed a stong photometric outburst according to the AAVSO special notice #232 http://www.aavso.org/aavso-special-notice-232 A new amateur international spectroscopic campaign has been designed to gather...