The Horsehead Nebula (Barnard 33) - Ha only (dswtan)

Celestial hemisphere: Southern · Constellation: Orion (Ori) · Contains: 50 Ori) · 50 zet Ori · Alnitak · B33 · Flame Nebula · Horsehead nebula · IC 434 · LBN 953 · LBN 954 · NGC 2023 · NGC 2024 · Orion B · Sh2-277 · The star Alnitak (ζ Ori

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The Horsehead Nebula (Barnard 33) - Ha only

Revision title: GradientCorrection in PI 1.8.9-2 (1601)

Powered byPixInsight

The Horsehead Nebula (Barnard 33) - Ha only

Revision title: GradientCorrection in PI 1.8.9-2 (1601)

One of my "white whales", the Horsehead. All the usual troubles with Alnitak, etc.

Sticking with Ha only. I captured some RGB, but was never happy with the results so far. Even Ha as luminance. Maybe one day!

First light with my new CEM70 -- much happier pairing with the AT130 EDT than the GEM45!

Basic workflow:
WBPP
GraXPert
BXT correct only
BXT light sharpening
NXT light noise reduction
EZ Soft Stretch for the stars
SXT for the nebula
STF Histogram Stretch - GHS experiments didn't improve on this
Further NXT
Recombine stars
Final contrast adjustments in Lighroom
Some halo healing in Lightroom

Original
Final
B

B

Title: GradientCorrection in PI 1.8.9-2 (1601)

Description: Reprocessed with basically the same workflow, except used the new GradientCorrection in PixInsight instead of GraXpert (2.2.2, AI mode, defaults). Much more subtle and sympathetic result. I like this!

Uploaded: ...

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Astro-Tech Imaging Group
The refractors!
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Imaged with N.I.N.A.

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Status	Advanced success
Started	...
Astrometry.net job	9344723
PixInsight job	RGGO1H4LQ4NJWUPNRLKE3IP50OCU5TAA
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	05h40m35s.22
RA (top/left)	05h38m57s.95
RA (top/right)	05h38m58s.81
RA (bottom/right)	05h42m12s.28
RA (bottom/left)	05h42m11s.15

Dec (center)	-02°23′24″.1
Dec (top/left)	-01°48′08″.6
Dec (top/right)	-02°58′54″.9
Dec (bottom/right)	-02°58′44″.4
Dec (bottom/left)	-01°47′58″.1

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The Horsehead Nebula (Barnard 33) - Ha only

Revision title: GradientCorrection in PI 1.8.9-2 (1601)

The Horsehead Nebula (Barnard 33) - Ha only

Revision title: GradientCorrection in PI 1.8.9-2 (1601)

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The Horsehead Nebula (Barnard 33) - Ha only

Revision title: GradientCorrection in PI 1.8.9-2 (1601)

The Horsehead Nebula (Barnard 33) - Ha only

Revision title: GradientCorrection in PI 1.8.9-2 (1601)

Equipment

Acquisition details

Description

Comments

Revisions

B

Sky plot

Histogram

In these public groups

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