The Orion and Running Man Nebulas (Alan Dyer)

Celestial hemisphere: Southern · Constellation: Orion (Ori) · Contains: Great Orion Nebula · IC 420 · Lower Sword · M 42 · M 43 · Mairan's Nebula · NGC 1973 · NGC 1975 · NGC 1976 · NGC 1977 · NGC 1980 · NGC 1981 · NGC 1982 · Orion Nebula · The star 41And · The star 42Ori · The star 45Ori · The star θ1Ori · The star θ2Ori · The star ιOri · Upper Sword · the Running Man Nebula

The Orion and Running Man Nebulas, Alan Dyer

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The Orion and Running Man Nebulas

Link: https://www.amazingsky.com/Amazing-Sky-Images-6-Months/i-H7jGgmj/A

Powered byPixInsight

The Orion and Running Man Nebulas

Link: https://www.amazingsky.com/Amazing-Sky-Images-6-Months/i-H7jGgmj/A

The Orion Nebula, aka Messier 42, at centre, with the blue Running Man Nebula (NGC 1973-5-7) above it. The smaller nebula attached to the top edge of M42 is M43. The blue star cluster at top above the Running Man is NGC 1981; the loose star cluster below M42 is NGC 1980.

This is a stack of 8 x 5-minute exposures with the Canon EOS Ra mirrorless camera at ISO 800 unfiltered, blended with a stack of 6 x 8-minute exposures at ISO 1600 but through the dual-band Optolong L-Enhance filter that records the faint red nebulosity very well. Blending and masking the filtered with the unfiltered shots allows the faint red nebulosity to come through while retaining the blues, magentas and even subtle greens of the bright nebulosity and the blue of the hot stars as recorded by the “white-light” images.

These two sets of long exposures are blended using luminosity masks with a set of 6 x 60-second exposures and 4 x 30-second exposures, both at ISO 400, for recording the bright core of M42 with its Trapezium stars that would otherwise be overexposed into a bright mass with only long exposures. The short exposures were all unfiltered. I applied a high-pass sharpening filter to snap up contrast in the dark lanes.

All were through the SharpStar HNT150 Hyperbolic Newtonian Astrograph at its native fast focal ratio of f/2.8. for a focal length of 420mm. Taken from home January 28, 2020.

All stacked, aligned and blended in Photoshop 2020.

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The Orion and Running Man Nebulas

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