CH Cygni

CH Cygni is a symbiotic star: a red giant and a White Dwarf coupled together with matter exchange... it is higly variable and fairly bright at the moment.

After a heavy rain in the late evening, I took some eShel spectra tonight with the C11: CH Cygni during 1h20m but also 31 Peg (Be star, spectrum in BeSS database).

 

CH Cygni: order 34 (Halpha)

 CH Cygni: order 38 (sodium doublet)

 CH Cygni: order 41

 CH Cygni: order 43

CH Cygni: order 46 (Hbeta)

 Spectrum of 31 Peg (order 34: Halpha)