After much confusion, it turns out this is incorrectly labelled as the Seagull Nebula in Sky 6 and again in Sky X (sheesh, youd think they would fix that
).
This is by far the dimmest object I have imaged. I cant find the mag anywhere, but Ha on my 10" (f8) was so buried in noise, even with 20min bin2 exposures, I gave up and used earlier Ha data from my LX200R 12" at f6.7.
The max ADUs on the 12" were some 350, out of 65000
, and for the 10" even less at bin2.
I like the look of this Neb, so I collected some 6nm SII and OIII bin2 data on the 10" to make a starless Ha:SII:Ha:OIII
here. The N59A neb is particularly interesting.
The earlier LX200R 12" HaRGB is
here.
Its artifact/noise city unforch. Other (few) examples on the net are taken with bigger flash gear,
Don Goldmans is a stand out, 16" and dark skies sure makes a diff
, I cant get close to that. The SII and OII were taken with the full moon up.
Here is a version with RGB stars inserted.
Details:
Ha:SII:Ha:OIII mapped as LRGB. Ha 10rs bin1:SII and OIII 6.6 hrs bin2.
All 20min subs
Off axis guided with with 2 second exposures
SII and OIII taken on a 10"RCOS RC at f9 (2275mm FL), PME mount and ST10XME in urban skies
Ha Taken on an LX200 12" OTA at f6.7
Image is cropped some 50%