A quick two-hour HOO capture of Barnard 33, aka IC 434 "The Horsehead Nebula." This set of subs - which included a barely discernable additional hour of SII - was captured this past December from our back yard observatory.
I attempted to process the subs right after it was collected but was not satisfied with my results in PixInsight (PI) - the tall Hα wave behind the horsehead was ruined by a bunch of light pollution (LP) from the moon and streetlight LP surrounding my property.
PixInsight recently released an update that includes their new gradient removal capability - GradientCorrection - it did an awesome job neutralizing the LP gradients.
TARGET INFOThe Horsehead nebula was discovered by Scottish astronomer Williamina Fleming in 1888 on a photographic plate taken at the Harvard College Observatory.=10.5px One of the first descriptions was made by E. E. Barnard, describing it as: "Dark mass, diam. 4′, on nebulous strip extending south from ζ Orionis", cataloguing the dark nebula as Barnard 33.
Source:
WikipediaCS & GB!
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