Celestial hemisphere:  Southern  ·  Constellation: Sagittarius (Sgr)  ·  Contains:  11 Sgr  ·  B302  ·  B303  ·  B91  ·  IC 1274  ·  IC 1275  ·  IC 4684  ·  IC 4685  ·  NGC 6559  ·  PK006-02.1  ·  Sh2-29  ·  Sh2-31  ·  Sh2-32  ·  The star 11Sgr
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IC 4685 Emission Nebula, Capturing Ancient Photons
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IC 4685 Emission Nebula

Getting plate-solving status, please wait...
IC 4685 Emission Nebula, Capturing Ancient Photons
Powered byPixInsight

IC 4685 Emission Nebula

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Description

My take on the emission nebula IC 4685 (an often neglected neighbor of the mighty Lagoon and Trifid nebulae) and in particular the dark "snake" nebula designated Barnard 303. 303 does not generate light but absorbs the light of the hydrogen cloud in its surrounds. The dark nebula spreads its path into 7 light years.
Shot in narrowband and using an SHO palette workflow involving colour chrominance mask (CGY) manipulation in PixInsight and addition of the Ha as an additional luminance layer.
180s SHO @-10C About 6.7hrs integration time

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IC 4685 Emission Nebula, Capturing Ancient Photons