M42 Orion Nebula (Narrowband SOO,L=H) (Douglas Triggs)

Celestial hemisphere: Southern · Constellation: Orion (Ori) · Contains: 41 the01 Ori · 42 c Ori · 43 the02 Ori · 44 iot Ori · 45 Ori · De Mairan's nebula · Great Orion Nebula · Hatysa · IC 420 · LBN 963 · LBN 974 · LBN 977 · LBN 979 · LDN 1640 · Lower Sword · M 42 · M 43 · Mairan's Nebula · NGC 1973 · NGC 1975 · NGC 1976 · NGC 1977 · NGC 1980 · NGC 1981 · NGC 1982 · NGC 1999 · Orion Nebula · Sh2-279 · Sh2-281 · The star 42Ori · And 7 more.

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M42 Orion Nebula (Narrowband SOO,L=H)

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M42 Orion Nebula (Narrowband SOO,L=H)

Narrowband version of the Orion Nebula.

I played around with this one for quite a while; I thought the SHO version looked fine (really, so did the other tri-color palettes I tried, though SHO was better), but in the end I think it just looked better in SOO (with the H-ɑ channel as luminosity — tried swapping H-ɑ and S-II there, but S-II was too focused in the core and the H-ɑ channel was broader, spatially. I mean, it still looked interesting, but... This was better). It just has more contrast this way, and it's the spatial detail that makes M42 pop, more than the color.

I thought the surrounding detail was really cool (and given the wide field, it seemed prudent to focus on that at the expense of the core) so I went ahead and blew the core out in favor of that.

I wanted to add the true color stars back in, but that just didn't work out; just too hard to separate the stars from the nebulosity on this target, though I did process the stars separately from the background nebulosity.

Fought a lot of marginal weather to get this data (wind made tracking a nightmare, and basically reached the point where I just turned off temperature-triggered refocusing because the temperature swings are so wild, and as often as not it just settles back to where it was before, it's easier just to throw out a few outlier frames with bad FWHMs and/or eccentricity). Scope even got rained on this morning when winds blew in suddenly. And let's just not talk about seeing.

Colorado weather is making me crazy. I'm not sure if clear skies I can't use are better or worse than just being cloudy.

William Optics Fluorostar Series
ZWO ASI2600MM Pro

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Status	Advanced success
Started	...
Astrometry.net job	5323038
PixInsight job	FOPGNTHNL1TJWGQE7MUEJTQ0EHNXKXTY
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	05h35m23s.60
RA (top/left)	05h30m21s.94
RA (top/right)	05h32m33s.81
RA (bottom/right)	05h40m25s.10
RA (bottom/left)	05h38m12s.64

Dec (center)	-05°23′36″.3
Dec (top/left)	-04°06′27″.1
Dec (top/right)	-07°02′16″.6
Dec (bottom/right)	-06°40′22″.2
Dec (bottom/left)	-03°44′46″.4

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M42 Orion Nebula (Narrowband SOO,L=H)

M42 Orion Nebula (Narrowband SOO,L=H)

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M42 Orion Nebula (Narrowband SOO,L=H)

M42 Orion Nebula (Narrowband SOO,L=H)

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