NGC 2736 | The Pencil Nebula Broadband-Narrowband Mix (Kevin Morefield)

Celestial hemisphere: Southern · Constellation: Vela (Vel) · Contains: HD77046 · HD77433 · NGC 2736 · Pencil Nebula

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NGC 2736 | The Pencil Nebula Broadband-Narrowband Mix

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NGC 2736 | The Pencil Nebula Broadband-Narrowband Mix

11,000 years ago a supernova shone 250 times brighter than Venus - clearly visible in the daytime. At only 815 light years away this SuperNova must have been an awesome sight. As the shock wave hit a region of dense gas it was heated and began to glow. The Pencil Nebula is but a small portion of that supernova in Vela. The long straight apperance of the brightest section resembles a pencil and was noted by Hershel. But with today's sensitive equipment, as with so many objects named during the days of visual observations, it has lost most of its pencil-like qualities.
Never the less, the contrast of this shockfront and the Ha background glow make for an interesting FOV.

I shot this in SHO and also shot a decent amount of RGB data, intending to use that for the stars. But the RGB data was quite good and I felt I could use the SHO and RGB in combination. I recalled doing this with M1 for the same reason and liking the result. I tried the exact same comination in Pixelmath and it worked out just how I imagined the image when looking at the raw masters. That mix is:

Red= Ha*.4 + SII*.2 + Red *.4
Green= Green*.4+OIII*1.2 - SII/3
Blue= OIII*.5 + Blue*.5

SXT was run on this result followed by BXT and NXT. An RGB master was also created with SXT to separate the stars. The RGB stars-only data were added to the SHORGB master in Photoshop as a Screen Blend Layer. Various color and curves adjustments were used to finalize color but the initial Pixelmath blend got me to 80-90% of the final color result.

Narrowband imaging

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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
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Status	Advanced success
Started	...
Astrometry.net job	7066927
PixInsight job	EE5IY3MZW2SRLXD5E2CERQI35JRYACRZ
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	08h59m28s.504
RA (top/left)	08h59m12s.216
RA (top/right)	09h01m46s.831
RA (bottom/right)	08h59m44s.539
RA (bottom/left)	08h57m09s.497

Dec (center)	-46°01′18″.63
Dec (top/left)	-46°26′14″.79
Dec (top/right)	-45°54′11″.94
Dec (bottom/right)	-45°36′21″.85
Dec (bottom/left)	-46°08′17″.17

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NGC 2736 | The Pencil Nebula Broadband-Narrowband Mix

NGC 2736 | The Pencil Nebula Broadband-Narrowband Mix

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Image Index:

Contribution Index (beta):

NGC 2736 | The Pencil Nebula Broadband-Narrowband Mix

NGC 2736 | The Pencil Nebula Broadband-Narrowband Mix

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