IC 4665 Open Star Cluster in Ophiuchus 2023-05-24

Aberkenfig, South Wales

Lat 51.542 N Long 3.593 W

 

Skywatcher 254mm Newtonian Reflector, Nikon D780 at prime focus with Skywatcher coma corrector. EQ6 Syntrek Mount.

 

An improvement using a Nikon & coma corrector compared to a previous attempt on 20th July 2019 using an Olympus E410.

 

Imaging session commenced 00:17 UT with the transparency of the sky quite reasonable.

 

50 x 25s at ISO 1600

Also 18 dark frames & 18 flats.

 

Processed with Deep Sky Stacker and levels adjusted with Lightroom & G.I.M.P.

 

Best viewed using the expansion arrows.

Done