Nova Delphini 2013 in night sky. It is marked in the image
V339 Delphini (also known as Nova Delphini 2013 and PNV J20233073+2046041) is a bright nova star in the constellation Delphinus. It was discovered on 14 August 2013 by amateur astronomer Koichi Itagaki in Japan, and confirmed by the Liverpool Telescope on La Palma. The nova appeared with a magnitude 6.8 when it was discovered and peaked at magnitude 4.3 on 16 August.
Coordinates: 20h 23m 30.68s, +20° 46′ 3.7″