Sh2-132 Lion Nebula in Cepheus

[Carole]

I have been wanting to image this again in SHO Hubble Palette after imaging this target back in 2018 in HOO.

Dual rig from Home Bortle 8

ED80 & Atik460EX
ED72 & Atik460EX
HEQ5
Ha 36 x 600
Oiii & Sii 14 x 300 binned each
SHO

Total imaging time 8h 20mins
https://www.astrobin.com/r5ipag/F/


Image edited, due to using a different laptop for processing it didn't come out as I thought it had.

[Carole]

Any-one know what causes that band of blue, it has always fascinated me but can't find any explanation for it?

Carole