NGC 4236 (RGB) (Linda)

Celestial hemisphere: Northern · Constellation: Draco (Dra) · Contains: NGC 4236 · PGC 2729018 · PGC 2729999 · PGC 2730166 · PGC 2730848 · PGC 2730972 · PGC 2731136 · PGC 2731233 · PGC 2731503 · PGC 2731666 · PGC 2731962 · PGC 39369

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NGC 4236 (RGB)

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NGC 4236 (RGB)

This was a faint spiral galaxy in Draco. It appears to have low surface brightness although the aggregate magnitude is not too dim. The individual subs, though showed up fairly dimly. The bright blue nebulae stood out quite a bit brighter than the rest of the galaxy and I had to, um, stretch my stretching skills to handle them. My first attempts kept blowing out the details in those nebulae by the time I was done. To prevent that I deferred the last step of my normal GHS triple (GHS, linear, GHS) and after the linear step did the remainder of my processing steps and then did my final GHS stretch. This worked out fairly well though it placed an upper limit on how far I could push the body of the galaxy. As it is, I was probably going as far with that as the data could support anyway so it seemed a good choice

Processing:

RGB:
channel combination
dynamic crop
DBE
SPCC
blurXterminator
starXterminator (extracting unscreened stars)
noiseXterminator
GHS (GHS, linear)
Histogram Transformation (masked to reduce a star halo)
HDRMT
LHE
GHS (GHS)
MLT (very mild sharpening)
pixel math (screen in stars)

stars:
GHS
unsharp mask (very mild sharpening)

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Status	Advanced success
Started	...
Astrometry.net job	7836258
PixInsight job	89ZCR9S5W1O9VKXK6T4JIXCB7TB6XRED
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	12h16m35s.428
RA (top/left)	12h20m11s.574
RA (top/right)	12h17m39s.860
RA (bottom/right)	12h12m55s.837
RA (bottom/left)	12h15m33s.795

Dec (center)	+69°27′05″.93
Dec (top/left)	+69°16′31″.65
Dec (top/right)	+69°48′08″.61
Dec (bottom/right)	+69°37′22″.64
Dec (bottom/left)	+69°06′00″.94

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NGC 4236 (RGB)

NGC 4236 (RGB)

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NGC 4236 (RGB)

NGC 4236 (RGB)

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