Celestial hemisphere:  Southern  ·  Constellation: Aquarius (Aqr)  ·  Contains:  Helix Nebula  ·  NGC 7293  ·  PK036-57.1
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NGC 7293, The Helix Nebula, Mark L Mitchell
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NGC 7293, The Helix Nebula

Getting plate-solving status, please wait...
NGC 7293, The Helix Nebula, Mark L Mitchell
Powered byPixInsight

NGC 7293, The Helix Nebula

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Description

This is from 3.5 h of narrowband data. I processed it many ways with startlingly different appearances. This is R = (0.5 Ha + 0.5 S2), G = (0.15 Ha + 0.85 O3), B = O3, with a hydrogen alpha luminance. It was processed without the stars - they were pasted back in later. This version has the best cometary knot detail and the least orange, but its non-nebular background and star colors are lost. I tried to add more H alpha last night, but wildfire smoke has decreased transparency here.

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NGC 7293, The Helix Nebula, Mark L Mitchell

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The refractors!