When I viewed this multi-star system, I didn't see the third element. C was not obvious to me visually in the C8. SkyTools had told me it was magnitude 13, which is doable with that instrument, but maybe lost in my local skyglow.
BGO refused my initial request so I aimed at the star Tycho 01602-0987 1, about a 1/4 of the field away.
Luminance only, 1 second subexposures, 12 stacked shots. FITS Liberator, Paint.NET. North is up; east is left.
First viewed on 2 Sep '19. The 3rd component of ε Sge is obvious in the image, opposite B, a little bit further away, a titch to the north. But dim. It is in the magnitude 12 to 13 range.
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Wikipedia link: epsilon Sagittae.
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