Sh 2-230: A HII-Region Comprising Many More Deep-Sky Object

Sh 2-230 is a very faint and extended emission nebula that encompasses a number of other a number of other Sharpless objects in the heart of Auriga. The Sharpless 2 catalogue (Sh 2) is a list of 312 HII (Hydrogen Emission Nebula) regions with the intention, to form a complete list of these objects north of declination δ = -27°. The first edition of the catalogue from 1953 was labelled Sharpless 1 (Sh 1).

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Sharpless 2-230 comprising Sh 2-234 (IC 417), Sh 2-236 (IC 410, NGC 1893), Sh 2-229 (IC 405), M38 (NGC 1912) and NGC 1907

The other Sharpless objects are Sh 2-229 (top centre, the so-called "Flaming Star Nebula", IC 405), Sh 2-236 (slightly to the right of the centre of the image with the well-known "tadpoles", NGC 1893), Sh 2-234 (bottom centre, IC 417), the open star cluster NGC 1912 (bottom left corner, M 38), NGC 1907 (also bottom left corner). As a small special feature, the two asteroids 3025 Higson and 987 Wallia moved through the image field after midnight during the two consecutive nights on 10 and 11 January. Their line trails are also marked in the labelled image. North left in the image.


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Annotated: Sharpless 2-230 comprising Sh 2-234 (IC 417), Sh 2-236 (IC 410, NGC 1893), Sh 2-229 (IC 405), M38 (NGC 1912) and NGC 1907


Exposure Data:
  • Telescope: Corrected Newton, f=430mm, f/3.3

  • Camera Canon EOS 60Da ISO800

  • Exposure Times
    • 125x180s

  • Total: 6h 15min

  • Date: 2024-01-10 Start about 0:50h UTC

  • Location: Bad Kreuznach / Germany

  • Mount Skywatcher EQ8R-pro / Pegasus Astro EQMod

  • Guiding and Exposure Control with INDI / PHD2 / CCDCiel running on XUbuntu Linux

  • Image Processing PixInsight and Darktable