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