Orion Nebula and Running Man Nebula in widefield (Paul Macklin)

Celestial hemisphere: Southern · Constellation: Orion (Ori) · Contains: De Mairan's nebula · Great Orion Nebula · IC 420 · LBN 963 · LBN 974 · LBN 977 · LDN 1640 · 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 · PGC 3081010 · Sh2-279 · Sh2-281 · The star 42Ori · The star 45Ori · The star θ1Ori · The star θ2Ori · The star ιOri · Upper Sword · VdB44 · the Running Man Nebula

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Orion Nebula and Running Man Nebula in widefield

Revision title: Reprocess (with all data)

Powered byPixInsight

Orion Nebula and Running Man Nebula in widefield

Revision title: Reprocess (with all data)

For my first take (Verisons A and B), I used data from Jan 28, 2022:

Just a quick one-night widefield take on the Orion Nebula with my trusty ZenithStar 61ii.

I took 55 x 15", 55 x 30", 55 x 60", and 55 x 120" and integrated them in AstroPixelProcessor using adaptive local normalization correction.

To help avoid blowing out the core, I manually set HL to 250 in APP (rather than the default 0). In Photoshop, I used a curve that stretched the lower end of the curve (concave-down between 0 and 128.), and the compressed the upper end of the curve (concave-up from 128 to 255). This is somewhat the reverse of typical contrast stretching curves, and it helped bring out the fainter nebulosity while toning down the core of M42.

It's tough to see in the final stretched product, but the data did resolve the Trapezium. (Look at image B.)

When I eventually go and learn PI, I'll properly combine my 15", 30" ,60", and 120" stacks into true HDR. But that's a future night when teaching is done. :-)

For my newer take (Version C), I used data from Jan 26, 2022, combining exposures from 30 seconds up to 600 seconds.

When I get a chance, I'll combine data from both nights.

Original
B
Final
C

B

Title: Detail on the 15" stack

Description: Here's some detail lurking in the 55 x 15" stack. When I take the plunge on PI this summer, there'll be some good data waiting for HDR. :-)

Uploaded: ...

C

Title: Reprocess (with all data)

Description: I wasn't happy with my last process, so I restacked with everything in one big batch. While the core is blown out, I'm happier with the overall composition.

This version has 13 x 30s + 18 x 60s + 15 x 180s + 14 x 300s + 1 x 600s = 8970s

Uploaded: ...

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Status	Advanced success
Started	...
Astrometry.net job	5518044
PixInsight job	CEND5QT1XZC2L27N9WW1DY0M3LN4SUMC
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	05h35m30s.30
RA (top/left)	05h38m58s.46
RA (top/right)	05h31m57s.19
RA (bottom/right)	05h32m01s.80
RA (bottom/left)	05h39m03s.63

Dec (center)	-05°15′49″.6
Dec (top/left)	-04°22′44″.8
Dec (top/right)	-04°23′49″.8
Dec (bottom/right)	-06°08′49″.4
Dec (bottom/left)	-06°07′40″.4

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Orion Nebula and Running Man Nebula in widefield

Revision title: Reprocess (with all data)

Orion Nebula and Running Man Nebula in widefield

Revision title: Reprocess (with all data)

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Image Index:

Contribution Index (beta):

Orion Nebula and Running Man Nebula in widefield

Revision title: Reprocess (with all data)

Orion Nebula and Running Man Nebula in widefield

Revision title: Reprocess (with all data)

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Acquisition details

Description

Comments

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C

Sky plot

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