NGC 2237, Rosette Nebula, SHO+HGB Stars, 30 Jan - 1 Feb 2019 (David Dearden)

Celestial hemisphere: Northern · Constellation: Monoceros (Mon) · Contains: 12 Mon · NGC 2237 · NGC 2238 · NGC 2239 · NGC 2244 · NGC 2246 · Rosette nebula · Sh2-275 · The star 12Mon

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NGC 2237, Rosette Nebula, SHO+HGB Stars, 30 Jan - 1 Feb 2019

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NGC 2237, Rosette Nebula, SHO+HGB Stars, 30 Jan - 1 Feb 2019

5200 LY

My best previous Rosette Nebula wasn’t too good, so I thought I’d try again and collect data for both HSO and LRGB (but using Hα for R). Unfortunately my optics don’t allow me to frame this quite as widely as I’d like, but I’ll take what they give me. I did a lot of fooling around with the processing so I’ve got several different color schemes.

Date: 30, 31 Jan, 1 Feb 2019

Subject: NGC 2237, Rosette Nebula

Scope: AT8IN+High Point Scientific Coma Corrector

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

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

Guiding: Orion Thin Off-axis Guider + DSI IIc +PHD 2.6.5dev6 (Win 10 ASCOM)

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

Acquisition: Sequence Generator Pro 3.0.3.151

Exposure: 36x300 Hα, 30x300 SII, 30x300 OIII, 22x300 L, 20x180 G, 20x180 B

Stacking: Deep Sky Stacker 4.1.1 (64-bit) dark+flat (no bias), κ-σ stacking with κ = 1.5.

Processing: StarTools 1.4.332: Separately processed Hα, SII, OIII, L, G, & B. Software binned 2x2, cropped, gradient wiped, developed, HDR optimized, star masked deconvolution, untrack denoised. Combined SHO using Annie’s Astro Actions, LHGB combination in StarTools. Screen combined LHGB on top of SHO in Photoshop. Curves & Levels. AstroFrame.

Final
Original
B
C

B

Description: SHO version

Uploaded: ...

C

Description: LHGB version

Uploaded: ...

Narrowband imaging
Image the Universe
ZWO ASI1600MM/QHY163M

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Status	Advanced success
Started	...
Astrometry.net job	2532659
PixInsight job	BAS7DXOI2023HGHQNQ10Q65W5RAXKQAT
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	06h32m01s.26
RA (top/left)	06h34m06s.10
RA (top/right)	06h29m52s.65
RA (bottom/right)	06h29m56s.34
RA (bottom/left)	06h34m09s.78

Dec (center)	+04°59′21″.1
Dec (top/left)	+05°25′07″.10
Dec (top/right)	+05°23′54″.1
Dec (bottom/right)	+04°33′23″.5
Dec (bottom/left)	+04°34′46″.10

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NGC 2237, Rosette Nebula, SHO+HGB Stars, 30 Jan - 1 Feb 2019

NGC 2237, Rosette Nebula, SHO+HGB Stars, 30 Jan - 1 Feb 2019

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NGC 2237, Rosette Nebula, SHO+HGB Stars, 30 Jan - 1 Feb 2019

NGC 2237, Rosette Nebula, SHO+HGB Stars, 30 Jan - 1 Feb 2019

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