IC 1396, Elephant Trunk Nebula, SHO Hubble Palette with RGB Stars, Aug 2019 (David Dearden)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: VdB142

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IC 1396, Elephant Trunk Nebula, SHO Hubble Palette with RGB Stars, Aug 2019

Powered byPixInsight

IC 1396, Elephant Trunk Nebula, SHO Hubble Palette with RGB Stars, Aug 2019

I thought I’d try a more magnified view of the Elephant Trunk in SHO using the AT8IN; my last previous attempt was a wider-field shot using the less-than-flat field of the Orion ST-80. I tried some different approaches to blending in the RGB stars. This is the result.

Date: 22, 23, 25 Aug 2019

Subject: IC 1396, Elephant Trunk Nebula

Scope: AT8IN+High Point Scientific Coma Corrector

Filters: ZWO 31 mm diameter unmounted 7 nm Hα, OIII, SII

Mount: EQ-6 (EQMOD 2.000j)+PEC

Guiding: Orion Thin Off-axis Guider + ASI120MM-mini +PHD 2.6.6 (Win 10 ASCOM)

Camera: ASI1600MM-Cool, -20 °C, Gain 139 Offset 21

Acquisition: Sequence Generator Pro 3.0.3.198

Exposure: 34x300 Hα, 20x300 OIII, 24x300 SII, 20x180 R, 20x180 G, 23x300 B

Stacking: Deep Sky Stacker 4.2.2 (64-bit) dark+flat+bias, κ-σ stacking with κ = 1.5.

Processing: StarTools 1.4.352: Software binned 2x2, cropped, wiped, developed, HDR optimized, deconvoluted, and untrack denoised the Hα, OIII, and SII data separately. Combined using Annie’s Astro Actions Hubble Palette process. Combined R, G, and B in StarTools, 2x2 software binned, cropped, wiped, developed, HDR optimized, deconvoluted, and untrack denoised. Healed the stars out of the SHO and made a stars-only image from the RGB (which was a little imperfect in that a little of the nebula remained). Combined the starless SHO with the RGB stars in Photoshop using “Lighten”. Boosted saturation. AstroFrame.

Image the Universe
ZWO ASI1600MM/QHY163M
Narrowband imaging

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Status	Advanced success
Started	...
Astrometry.net job	2907875
PixInsight job	3JVBBF4QOOWWO6J4LYM8QMZ87HPV8NT8
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	21h34m38s.80
RA (top/left)	21h30m25s.23
RA (top/right)	21h38m35s.68
RA (bottom/right)	21h38m56s.54
RA (bottom/left)	21h30m34s.82

Dec (center)	+57°41′31″.0
Dec (top/left)	+57°16′58″.5
Dec (top/right)	+57°14′23″.3
Dec (bottom/right)	+58°05′30″.6
Dec (bottom/left)	+58°08′10″.2

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IC 1396, Elephant Trunk Nebula, SHO Hubble Palette with RGB Stars, Aug 2019

IC 1396, Elephant Trunk Nebula, SHO Hubble Palette with RGB Stars, Aug 2019

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IC 1396, Elephant Trunk Nebula, SHO Hubble Palette with RGB Stars, Aug 2019

IC 1396, Elephant Trunk Nebula, SHO Hubble Palette with RGB Stars, Aug 2019

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