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Title: Skull and Crossbones Nebula Experimenting with NBColourMapper script

Description: DESCRIPTIONThe Skull and Crossbones nebula is comprised of a few stellar groups along the same line of sight but at different distances from Earth. The three main elements are:
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The nebula, NGC 2467, or Sharpless 2-311, appears as the brightly glowing stellar furnace on the right center of this image. This nebula is estimated to be 21,000 light years from Earth.·
Haffner 19, the bright circular structure slightly above and right of the center of the image. Haffner 19, is a compact star cluster which contains a Strömgren sphere (a well known example of a Strömgren sphere is the Rosette Nebula). It is estimated to be about 21,000 light years from Earth.·
Haffner 18 is the string of stars extending away from the small bright knot of red glowing gas just below Haffner 19. It is another open star cluster and star forming region. It is hard to ascertain from online references, but it seems that glowing knot is part of the cluster containing a young, short lived, massive star still surrounded by a small, dense shell of hydrogen. The star has the rather cryptic name of FM3060a.

This cluster is about 19,000 light years from Earth.I’m am usually curious when I encounter a new catalog designation, such as Haffner, and like to learn a little more about its history. According to the https://www.stellar-journeys.org/ website, German astronomer Hans Haffner (1912 - 1977), while working at Boyden Observatory in South Africa, created a catalog of "New Galactic Star Clusters in the Southern Milky Way", containing 26 open clusters. Additionally, during the 1960’s, Haffner served as chairman of the open clusters section of the IAU.

While some of the 'Haffner' objects are already listed under other catalog designations such as 'NGC', the majority are unique objects, not listed in any other prior catalog. Haffner clusters can be found along the Milky Way in Canis Major and Puppis..

EDIT: This is a significant revision to my earlier post. The earlier image used RGB with H and O added to the image to enhance the visibility of the emission nebula. This version only used the SHO data, mapped to colors in a manner similar to the method used in Adam Block's YouTube video demonstrating the NBColourMapper script. The remaining post processing was typical of what I do for any RGB image. One key difference that results from the script are sharper detail in the nebula structure. Structure is softer when broadband data is used. The intensity and saturation differences from my earlier version were more one of choice about how to present the subject.

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