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Contains:  IC 4601, IC 4592, The star ωOph, The star χOph, The star ψOph, The star νSco, The star ω2Sco, The star ω1Sco, The star β2Sco, The star Graffias (β1Sco)
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Blue Horsehead Nebula, 


            Björn Hoffmann
Blue Horsehead Nebula

Blue Horsehead Nebula

Technical card

Resolution: 2000x1125

Dates:May 28, 2017

Frames: 121x30" ISO1600

Integration: 1.0 hours

Flats: ~30

Avg. Moon age: 3.11 days

Avg. Moon phase: 10.55%

Bortle Dark-Sky Scale: 3.00

Temperature: 14.00 job: 1610986

RA center: 244.790 degrees

DEC center: -19.593 degrees

Pixel scale: 12.655 arcsec/pixel

Orientation: 1.578 degrees

Field radius: 4.033 degrees


This is my first try on this faint nebula near to the Rho Ophiuchi complex. I planned a 2-tile pano of both areas, but the gradients and the completely different processing that is needed, make it hard to combine those. So here's the horsehead alone!



Björn Hoffmann
License: Attribution-NonCommercial-NoDerivs Creative Commons


  • Blue Horsehead Nebula, 


            Björn Hoffmann
  • Final
    Blue Horsehead Nebula, 


            Björn Hoffmann


no "upside down" horse anymore ;) More artistic processing, including blur, glow effect, detail contrast.

Sky plot

Sky plot


Blue Horsehead Nebula, 


            Björn Hoffmann