M33 + HA/OIII (Andrew Burwell)

Celestial hemisphere: Northern · Constellation: Triangulum (Tri) · Contains: IC 131 · IC 132 · IC 133 · IC 135 · IC 136 · IC 137 · IC 142 · IC 143 · M 33 · NGC 588 · NGC 592 · NGC 595 · NGC 598 · NGC 604 · PGC 1876404 · PGC 1883033 · PGC 1883861 · PGC 1886457 · PGC 1886693 · PGC 1889040 · PGC 1916717 · PGC 1920142 · PGC 1928235 · PGC 1928851 · PGC 1936458 · PGC 1938666 · PGC 1938988 · PGC 1939705 · PGC 1944776 · PGC 1946261 · And 22 more.

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M33 + HA/OIII

Link: https://www.macobservatory.com

Powered byPixInsight

M33 + HA/OIII

Link: https://www.macobservatory.com

I continue to be impressed with the dark skies and the level of detail that can be resolved by this setup when seeing conditions are really nice. I've shot this target many times from light polluted skies, and this is my first crack at it from New Mexico. At first I only shot LRGB, but after doing so, I thought I could resolve the local nebulas with greater detail if I also shot HA and OIII, so added that data, and it did indeed enhance multiple local nebulas within the galaxy. This was especially challenging to process since there are resolvable stars within M33, standard denoise processes would wipe out the stars as noise, so a luminance mask was required to remove noise. I've also included an unprocessed HA/OIII image to show the impact of the additional filter data.

Final
Original
B

B

Title: M33 Unprocessed HA + OIII

Description: Here's what the unprocessed HA and OIII combined looked like prior to adding into the LRGB.

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Status	Advanced success
Started	...
Astrometry.net job	8319273
PixInsight job	GD0GBQGM95S3BGM09RVJ25YSEN8K9JDY
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	01h33m51s.666
RA (top/left)	01h30m31s.491
RA (top/right)	01h30m46s.636
RA (bottom/right)	01h37m07s.810
RA (bottom/left)	01h37m01s.154

Dec (center)	+30°40′13″.47
Dec (top/left)	+31°41′20″.80
Dec (top/right)	+29°37′11″.70
Dec (bottom/right)	+29°38′42″.36
Dec (bottom/left)	+31°42′55″.76

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M33 + HA/OIII

M33 + HA/OIII

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M33 + HA/OIII

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