Helix Nebula (HOO+S) (Linda)

Celestial hemisphere: Southern · Constellation: Aquarius (Aqr) · Contains: Helix Nebula · MQ J222829.07-204253.7 · MQ J222839.40-203210.9 · MQ J222844.33-204727.5 · MQ J222845.88-205923.3 · MQ J222854.76-205447.8 · MQ J222903.51-205638.7 · MQ J222906.12-204213.4 · MQ J222914.70-205748.3 · MQ J222921.57-205659.1 · MQ J222936.98-204020.5 · MQ J222938.96-203626.6 · MQ J222948.36-203901.1 · MQ J222948.80-203927.2 · MQ J222951.77-204144.2 · MQ J223003.52-205419.9 · MQ J223006.54-203922.2 · MQ J223010.48-205554.7 · NGC 7293 · WISEA J222757.82-210508.5 · WISEA J222816.68-203226.6 · WISEA J222824.17-210407.0 · WISEA J222826.07-203213.8 · WISEA J222852.23-204225.6 · WISEA J222852.87-203433.3 · WISEA J222853.02-210214.6 · WISEA J222919.31-203305.3 · WISEA J222935.10-204915.3 · WISEA J223004.79-205135.3 · WISEA J223037.96-205745.7 · And 4 more.

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Helix Nebula (HOO+S)

Link: https://lindasastronomyadventures.space/?p=11752

Powered byPixInsight

Helix Nebula (HOO+S)

Link: https://lindasastronomyadventures.space/?p=11752

Since planetary nebulae are so small in an absolute sense they tend to be small in our fields of view even at longer focal length. Thankfully the Helix being only around 650 light years away has a larger apparent size making it a great target for any size scope. The only downside is that it's never very high for us mid-northern latitude folks.

This was HOO (with S thrown into the Lum channel) with RGB stars. The S didn't add much but it did add some detail that wasn't in the others so I added it in.

Processing:

RGB:
channel combination
DBE
SPCC
blurXterminator
GHS (GH)
starXterminator (extracting unscreened stars)

stars:
GHS (GH)

H:
blurXterminator
GHS (GH)
starXterminator (extracting unscreened stars) - did this after first stretch as doing it before left non-stellar artifacts in core of nebula star field
GH (linear, GH)
noiseXterminator

O:
DBE
blurXterminator
starXterminator
GHS (GH, linear, GH)
noiseXterminator

S:
blurXterminator
starXterminator
GHS (GH, linear, GH)
noiseXterminator
curves (contrast)

HOO
channel combination
histogram (align peaks, small contrast adjustment)
histogram (using masks of upper left and bottom right corners to remove CCD amp glow)
extract L from image and pixel math in max(S,$T) then channel combination the L back in
Curves (contrast)
Curves (using mask of core - to shift teal toward blue to better match RGB version of the core)
LHE (lightly done at two scales)
MLT (mild sharpening)
pixel math in stars (screen)
dynamic crop

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Status	Advanced success
Started	...
Astrometry.net job	8614917
PixInsight job	PA1OSP8FHZW67BR16ECKMGNFZW846INS
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	22h29m38s.596
RA (top/left)	22h31m14s.832
RA (top/right)	22h27m54s.967
RA (bottom/right)	22h28m02s.776
RA (bottom/left)	22h31m21s.871

Dec (center)	-20°49′56″.53
Dec (top/left)	-21°08′41″.58
Dec (top/right)	-21°06′23″.70
Dec (bottom/right)	-20°31′08″.62
Dec (bottom/left)	-20°33′26″.57

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Helix Nebula (HOO+S)

Helix Nebula (HOO+S)

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Helix Nebula (HOO+S)

Helix Nebula (HOO+S)

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