RCW 105 or Gum 51. Emission Nebula in southern constellation Norma (Alastairmk)

Celestial hemisphere: Southern · Constellation: Norma (Nor)

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RCW 105 or Gum 51. Emission Nebula in southern constellation Norma

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RCW 105 or Gum 51. Emission Nebula in southern constellation Norma

Rather faint southern hemisphere emission nebula that does not seem imaged often. Images acquired in Queenstown, New Zealand over three nights. Chose this image simply because it was visible from the narrow view of the sky from our balcony. Subframes taken with 4 minute exposures through ZWO narrowband filters Ha 20x240s, OII 15x240s & SII 17x240s for total integration time of 3.5 hours. Most of the nebulosity was on the Ha channel. Processed with Pixinsight. Used the CFHT colour palette Ha OIII SII mapped to RGB consecutively.

Linear processing: DBE (Ha) ABE (OIII,SII); Mure Denoise; Deconvolution with Dynamic PSF, star mask & image masks; Background Neutralization; TGV Denoise; SCNR on inverted image to remove green causing magenta stars; Photometric colour calibration

Non-Linear processing: Curves Transform including saturation boost; Multistage Median Transform with noise reduction on 4 of 8 layers; Morphological Transform to reduce star brightness; SCNR to remove blue tint on inverted image; final adjustments in Curves Transform

NOVAC

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Status	Basic success
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Astrometry.net job	2701848
PixInsight job	n/a
PixInsight queue size	n/a
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RCW 105 or Gum 51. Emission Nebula in southern constellation Norma

RCW 105 or Gum 51. Emission Nebula in southern constellation Norma

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RCW 105 or Gum 51. Emission Nebula in southern constellation Norma

RCW 105 or Gum 51. Emission Nebula in southern constellation Norma

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