NGC 6504 (also MCG 6-39-27, UGC 11053 and PGC 61129) is a magnitude +12.6 spiral galaxy located 220 million light-years away in the constellation Hercules.
The galaxy was discovered by German astronomer Albert Marth using a 1.2m (48 inch) Newtonian reflector at William Lassell's Tigné Point observatory in Sliema, Malta, on the 27th July 1864.
Right Ascension 17h 56m 05.6s, Declination Dec +33° 12' 31"