Simeis 147, Spaghetti Nebula in Taurus (weine006)

Celestial hemisphere: Northern · Constellation: Taurus (Tau) · Contains: 112 Tau) · El Nath (β Tau · The star 118 Tau · The star 125 Tau · The star 132 Tau · The star 136 Tau · The star 22 Aur · The star 26 Aur · The star Elnath

Simeis 147, Spaghetti Nebula in Taurus, weine006

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Simeis 147, Spaghetti Nebula in Taurus

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Simeis 147, Spaghetti Nebula in Taurus

This is the third supernova remnant object I've shot in narrowband but Simeis 147 is much fainter and larger in apparent diameter than the Western Veil or Jellyfish nebula (probably because it's older). I wanted to capture the nebula with surrounding sky background but that requires a FOV of > 6 degrees so my setup was a 200 mm f4 Askar lens with a ZWO 6200 MM camera shooting HOO with RGB stars. Even at f4 and a 600 sec sub, I could barely see the object with an O3 filter. There was vignetting but flats helped. Tilt distorted some corner stars requiring a slight crop at the end. Processing was complicated by the moderate Ha signal and very weak O3.

All in Pixinsight: WBPP. DBE, BXT. Stretched H and O with HT. Removed stars with SXT. With masks, adjust nebula lightness with Curves and decrease background. PixelMath combine HOO. NarrowbandNormalization HOO palette, Lightness Ha, Blend Mode 1, slight O3 boost so the Ha signal is a gold-brown with a blue O3. SCNR 50%. With masks, adjustments with LHE, Curves and UnsharpMask. NXT 70%. Add RGB stars with PixelMath.

With a nebular diameter of about 150 light years in an image 7000 pixels wide, it's humbling to acknowledge that our solar system (Sun to Pluto) would fit in 1/20th of a pixel.

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Status	Basic success
Started	...
Astrometry.net job	8853961
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Simeis 147, Spaghetti Nebula in Taurus

Simeis 147, Spaghetti Nebula in Taurus

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Simeis 147, Spaghetti Nebula in Taurus

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