NGC1555 and the foggy, foggy dew (Brian Boyle)

Celestial hemisphere: Northern · Constellation: Taurus (Tau) · Contains: Hind's Nebula · Hind's Variable Nebula · LBN 817 · NGC 1554 · NGC 1555 · Sh2-238 · Struve's Lost nebula · VdB28

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NGC1555 and the foggy, foggy dew

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NGC1555 and the foggy, foggy dew

Here is an images of NGC1555 that I am stupidly pleased with. I really like this dust/smoky nebula, which rather looks like someone doing a fist pump to me. Or perhaps the "Get down and boogie, man" nebula?

However, I never thought I was going to post this observation from Roboscopes Pier 5. 130 x 300s frames were all badly affected by high cloud/fog/dew. Lots of horrible star halos that couldn't be eliminated by taking only a subset of frames.

I also tryied many of the recipes here, including star marks + wavelet removal. The closest I came was the rather time consuming PixelMath mask generation, convolution and HistgramTransformation for each annoying star.

Eventually I hit on a technique involving, StarMask, (RangeSelection, Convolution ) x 2 and Curves Transformation. The result isn't perfect, and nothing can recover the poor SNR caused by the cloud/fog., but at least I am not embarrassed to publish on AB. I will continue to experiment with the method, and I am happy to report back to anyone who might be interested. [I suspect, however, I have only re-discovered a well known technique used by more experienced AP'ers than me]

Original
Final
B

B

Description: Now with 200 x 300sec in better conditions. Still a lot of blue car bloat. Must be a telescope feature.

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New Zealand Astrophotography
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Status	Advanced success
Started	...
Astrometry.net job	5458041
PixInsight job	DCHS0JOKFOUFHQ5151TW9QQEXDG8J7K7
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	04h21m32s.60
RA (top/left)	04h25m23s.11
RA (top/right)	04h17m11s.70
RA (bottom/right)	04h17m43s.48
RA (bottom/left)	04h25m51s.85

Dec (center)	+19°31′25″.5
Dec (top/left)	+20°15′13″.6
Dec (top/right)	+20°04′12″.7
Dec (bottom/right)	+18°47′36″.9
Dec (bottom/left)	+18°58′12″.3

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NGC1555 and the foggy, foggy dew

NGC1555 and the foggy, foggy dew

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NGC1555 and the foggy, foggy dew

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