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NGC 5128 Centaurus A Galaxy
Decided to give NGC 5128 a go on Wednesday night as conditions looked ok , but ended up with a very poor image
Probably asking to much to image a 7 mag Galaxy with my old DSLR under Bortle 8 Sydney skies
6” f6 Bintel GSO newt on an EQ6-R mount
Canon 600D with Baader coma corrector and no filters
Home made DSLR cooling fan ( sensor electronics temperature 23 deg C )
Bortle 8 skies
ISO 800
90 x 90 sec dithered guided subs
25 x darks
Dithering set to medium and dithered every sub
PHD2 guiding ( 0.90 to 1.10 arc sec error )
Frame, focus and capture with BYEOS
Navigation, Goto and tracking EQMOD, StellariumScope and Stellarium
Stacked in DSS
Processed in Startools
Realised after 60 subs that focus was drifting off so spent 20 minutes to refocus
Seeing looked ok but jetstream was running +60knots
Even with dithering and darks stacked image was very noisy with bloated stars
Processed and reprocessed image and this is the best result I could get
In hindsight,I shouldn’t take on imaging galaxies in Sydney with my DSLR and only chase them down at my weekender ( Bortle 3 skies ) and I’ve had great results in the past
Thanks for looking , any comments welcome
Cheers
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