C27 Cresent Nebula


Mark Griffith

Swindon, Wiltshire. UK

Celestron C11 Sct, Skywatcher EQ8 pro mount,Atik 383L+ camera, motorised filter wheel and Astronomik filters. F6.3 focal reducer.

Expanding shell of hydrogen and oxygen gas in the constellation of Cygnus.

Cygnus is my favourite constellation. Full of emission nebula suitable for narrowband imaging and away from my neighbour’s overgrown trees.

Constellation is now well placed in the early morning this month.

Doubled my oxygen and sulphur exposes to 15 minutes as the hydrogen alpha component is very strong for this object.

Not much of a sulphur component so collected more oxygen and hydrogen alpha exposures.

Near the bright star Sadr that I use for focusing with a Barthinov mask.

Data collected on 4 nights 26th february & 22nd, 24th, 26th March.

Sii Ha Oii image with 9 hours and 37 minutes of data. 9 x Sii 15 min, 27 x Ha 7.5 min, 16 x Oii 15 minute. 2×2 binning.