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NGC6857 HaRGB, andrea tasselli

NGC6857 HaRGB

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NGC6857 HaRGB, andrea tasselli

NGC6857 HaRGB

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Description

NGC6857 is a small maybe a PN or maybe a knot of HII lost in the Solitudes Borealis of Cygnus. While quite unsure of its true nature (I think the jury is still out on this) I found processing this little bugger a rather difficult affair. First try in 2005 had it revamped in 2006 and then 2007, then again in 2020 using PI. Not sure it is got any better, still very difficult to tease out detail. Originally planned as LHaRGB I found the luminance frame too poor and resorted to the traditional mixing of Ha in the R channel and then going on a pure tri-chromatic route to the final composite.

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