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S617 triple star. Work to do...

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robin_astro    115

Hi Matt,

Ah OK,  from the original noisy spectrum, I thought it was going to turn out much hotter (A perhaps). This excellent spectrum looks  closer to the catalogued type but it gets tricky at Star Analyser resolution in the  late F/G/early K region.  You have to be careful going just by the broad shape of the continuum as it can be distorted interstellar extinction. Precise classification is done by looking at the lines at 10A or more resolution traditionally , higher than  the Star Analyser can usually give. I am not an expert on that though. 



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