M42 and Horsehead Nebula (Wei-Hao Wang)

Celestial hemisphere: Southern · Constellation: Orion (Ori) · Contains: 31 Ori · 34 del Ori · 41 the01 Ori · 42 c Ori · 43 the02 Ori · 44 iot Ori · 45 Ori · 46 eps Ori · 48 sig Ori · 50 zet Ori · Alnilam · Alnitak · B33 · De Mairan's nebula · Great Nebula in Orion · Hatysa · Horsehead nebula · IC 423 · IC 426 · IC 430 · IC 431 · IC 432 · IC 434 · IC 435 · M 42 · M 43 · Mintaka · NGC 1973 · NGC 1975 · NGC 1976 · And 29 more.

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M42 and Horsehead Nebula

Link: http://www3.asiaa.sinica.edu.tw/~whwang/gallery/picutres/M42_horsehead_2014.htm

Powered byPixInsight

M42 and Horsehead Nebula

Link: http://www3.asiaa.sinica.edu.tw/~whwang/gallery/picutres/M42_horsehead_2014.htm

L is a 12-frame mosaic at F7.1 with the field flattener. Each frame contains 8 5-min exposures.

RGB and H alpha are 6-frame mosaics at F5.6 with the focal reducer. Each frame contains 6 5-min exposures at R,G,B each and 3 10-min exposures at H alpha.

Bias, dark, and flat-field corrections, and drizzle stacking made in my own IDL program. Stacked images mosaicked in Registar. LRGB composition and final processing in Photoshop.

The current version is a reprocessing in 2016, based on the same stacked mosaic image. Here I also used a little DSLR RGB data from http://www.astrobin.com/159044/, to patch the ghost reflection and low S/N area in the original RGB CCD image.

Ver.C (final) is a reprocessing in 2020, with no additional data. The original image has 344 mega pixels. The uploaded version is a 0.5x reduction.

Original
Final
C

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Status	Advanced success
Started	...
Astrometry.net job	3285229
PixInsight job	FTSZOPYKVKVCHL9SL95ZOHXZVJ93H2M8
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	05h38m22s.17
RA (top/left)	05h47m53s.70
RA (top/right)	05h28m55s.24
RA (bottom/right)	05h28m46s.31
RA (bottom/left)	05h47m54s.95

Dec (center)	-03°38′46″.4
Dec (top/left)	-00°07′29″.1
Dec (top/right)	-00°07′04″.10
Dec (bottom/right)	-07°10′13″.10
Dec (bottom/left)	-07°10′51″.4

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M42 and Horsehead Nebula

M42 and Horsehead Nebula

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M42 and Horsehead Nebula

M42 and Horsehead Nebula

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