Another go a this for the ASE Caldwell Project. A really tricky one this. Hidden in the dust from our own galaxy, this would actually be naked eye brightness if not obscured. From two sets of data but still challenging.
Added more data to this one but still very tricky. More horrible gradients to deal with. The IDAS P2 LP filter is no longer doing it’s job with the change in LP sources round here. Have now bought the IDAS D3 to see if that is any better as it deals more with LED lighting.
Added twice as many frames as normal – still noisy. Probably need longer exposures. Bad gradients needed a lot of work in APP. UPDATE: Used the demo versions of TOPAZ DeNoiseAI and it makes a huge difference. Removes noise without removing details. Other de-noising seems to just blur features – this is far more intelligent.
Processed 3 different ways – give different results, not sure which I like best. Still too noisy – need many more exposures. Interesting edge-on spiral galaxy in Coma Berenices, surprisingly large (14.9′ x 2′) but faint (9.60 but surface brightness 13.3). It is actually intrinsically more luminous than the Andromeda Galaxy. First seen by William Herschel in 1785. Also visible lower right is NGC 4562.
NGC 4565, Caldwell 38 Spindle Galaxy
203mm RC8 f8
Atik 460Ex @-20C Badder RGB filters IDAS P2 LP filter