M42 Orion Nebula and Horsehead Nebula (Göran Nilsson)

Celestial hemisphere: Southern · Constellation: Orion (Ori) · Contains: 31 Ori · 41 the01 Ori · 42 c Ori · 43 the02 Ori · 44 iot Ori · 45 Ori · 46 eps Ori · 48 sig Ori · 49 d Ori · 50 zet Ori · Alnilam · Alnitak · B33 · De Mairan's nebula · Great Nebula in Orion · Hatysa · Horsehead nebula · IC 430 · IC 431 · IC 432 · IC 434 · IC 435 · M 42 · M 43 · NGC 1924 · NGC 1973 · NGC 1975 · NGC 1976 · NGC 1977 · NGC 1980 · And 26 more.

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M42 Orion Nebula and Horsehead Nebula

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M42 Orion Nebula and Horsehead Nebula

Taken with Sigma 70-200 APO DG HSM f/2.8. At 200 mm f/2.8. Clearly I will stop it down next time since there is a lot of coma but if you do not zoom in it looks rather good. I used Tony Hallas method of using Adobe Raw processing in Photoshop (https://www.youtube.com/watch?v=PZoCJBLAYEs) which led to a great improvement compared to my first traditional attempt. This procedure can automatically compensate for the particularities of a specific lens (but it cannot beat coma).

5 x 180 s (ISO 2500) for most of the image and 11 x 60 s (ISO 1600) blended in for the M42 core

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Status	Advanced success
Started	...
Astrometry.net job	896952
PixInsight job	H869MJ9YVJQB9ZF36D53VZETXOEHZG35
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	05h36m07s.10
RA (top/left)	05h28m02s.44
RA (top/right)	05h26m59s.10
RA (bottom/right)	05h44m17s.66
RA (bottom/left)	05h45m09s.65

Dec (center)	-03°55′57″.7
Dec (top/left)	-00°35′04″.10
Dec (top/right)	-07°06′17″.7
Dec (bottom/right)	-07°15′42″.9
Dec (bottom/left)	-00°45′03″.1

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M42 Orion Nebula and Horsehead Nebula

M42 Orion Nebula and Horsehead Nebula

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M42 Orion Nebula and Horsehead Nebula

M42 Orion Nebula and Horsehead Nebula

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