A long exposure spectrum of YY Her from 6000 to 7100 Ang. at R=9000. Current V mag = 13.1.
Tim
YY Her at R=9000
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Re: YY Her at R=9000
That's excellent at such a low luminosity.
Nice H alpha profile
Let's go on
François
Nice H alpha profile
Let's go on
François
François Teyssier
http://www.astronomie-amateur.fr
http://www.astronomie-amateur.fr