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Contains:  NGC 2023, Horsehead nebula, IC 434
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Horse Head Nebulae, 


Horse Head Nebulae

Horse Head Nebulae

Technical card

Resolution: 2815x1827

Dates:Dec. 24, 2014Dec. 28, 2014

Frames:Hutech IDAS LPS-V4 : 10x600" -10C bin 1x1

Integration: 1.7 hours

Flats: ~9

Bias: ~20

Avg. Moon age: 4.89 days

Avg. Moon phase: 27.40%

Mean SQM: 19.40

Mean FWHM: 3.10 job: 1161507

RA center: 5h 40' 56"

DEC center: -2° 27' 10"

Pixel scale: 0.761 arcsec/pixel

Orientation: 98.416 degrees

Field radius: 0.354

Locations: SNB, Saint Nom La Breteche, Yvelines, France


This photo is my first attempt to use HDR (high dynamic range) integration in PI to avoid having saturated stars. I used 3x60s subs to combine with the 10x600s subs. It worked OK and this method can be used to do photometry on bright stars or to avoid saturated areas of extended objects.

Pre-processing done in Pixinsight :
- overscan area offset correction
- bias correction
- flat correction
- hot pixel correction
- debayer
- registration
- stack
Processing done in Pixinsight :
- color calibration using stars
- slight color sat
- no residual sky background substraction due to extendeur nebulae
- converted to non linear image

Final image :
- jpeg calibration done in Mac Photo



License: None (All rights reserved)

Sky plot

Sky plot


Horse Head Nebulae,