Celestial hemisphere:  Southern  ·  Constellation: Orion (Ori)  ·  Contains:  Horsehead nebula  ·  IC 431  ·  IC 432  ·  IC 434  ·  IC 435  ·  NGC 2023  ·  NGC 2024  ·  The star Alnitak (ζOri)  ·  The star σOri
IC434, Horsehead nebula, Bart Delsaert
IC434, Horsehead nebula
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IC434, Horsehead nebula

IC434, Horsehead nebula, Bart Delsaert
IC434, Horsehead nebula
Powered byPixInsight

IC434, Horsehead nebula

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Description

I'm relatively happy with the result, except for one thing. If you look carefully you might notice that the bright flares near the center of Alnitak have a rectangular shape (and to a lesser extent on less brighter stars). Something to do with optical diffraction somewhere in the image train? Suggestions are welcome.

90x60s L + 3x30x60s RGB

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IC434, Horsehead nebula, Bart Delsaert