IC4665 "Summer Beehive Cluster"

IC4665 "Summer Beehive" / "Літній Вулик" / "Летний Улий" Lens aperture: f/5.6 Darks: 120s x 20 @ ISO 800 Offsets/Bias: 1/4000s x 30 @ ISO 800 Guide scope lens aperture: f/3.5 Open star cluster in the Ophiuchus constellation, right near the β Ophiuchus star (named Cebalrai). The DEC guiding let me down a bit... Cebalrai – from the Arabic "كلب الراعي kalb al-rā‘ī" – "the shepherd's dog". (@ https://en.wikipedia.org/wiki/Beta_Ophiuchi).