The GCVS position for this star is substantially in error.
From Henden/Sumner sequence files
V478 HERCULIS (UGSU) Range: 15.5p-17.2V
Position: 17 21 05.63 +23 39 37.0 (J2000, from .dat file)
Magnitude: V=17.183 B-V=0.422
Regards,
M. Simonsen
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