HD 174638 ( Beta Lyrae ) Exp.time : 12x10 sec. 0.25m f/6.85 MX916 CCD. Date : 2004 06 29.915 UT
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( HD 174664 is the fainter above ).. Also see Sci Fi - Arizona / Don Dixon Spacescapes.
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STAR SPECTROSCOPE by RAINBOW OPTICS