mu Sgr at 115 days

22 spectra of mu Sgr showing clear evidence of the orbital characteristics of this enigmatic¬†binary, now 115 days through its 180 day period. The variability could show evidence of atmospheric eclipsing, together with wind variability. As the target sinks towards the dusk sky, ¬†it’s unlikely that many more spectra will be available this season.hd166937_velocity

phaseplot_118

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