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Contains:  NGC 2244, Rosette nebula, NGC 2239, The star 12Mon
Getting plate-solving status, please wait...
NGC 2237, Rosette Nebula, SHO+HGB Stars, 30 Jan - 1 Feb 2019, 





    
        

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

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

Technical card

Resolution: 2203x1760

Dates:Jan. 30, 2019Jan. 31, 2019Feb. 1, 2019

Frames:
ZWO Blue 31 mm: 20x180" (gain: 139.00) -20C bin 1x1
ZWO Green 31 mm: 20x180" (gain: 139.00) -20C bin 1x1
ZWO H-alpha 7nm: 36x300" (gain: 139.00) -20C bin 1x1
ZWO Luminance 31 mm: 22x300" (gain: 139.00) -20C bin 1x1
ZWO OIII 31 mm 7 nm: 30x300" (gain: 139.00) -20C bin 1x1
ZWO SII 7nm: 30x300" (gain: 139.00) -20C bin 1x1

Integration: 11.8 hours

Avg. Moon age: 25.59 days

Avg. Moon phase: 17.03%

Bortle Dark-Sky Scale: 5.00

Astrometry.net job: 2532659

RA center: 98.006 degrees

DEC center: 4.989 degrees

Pixel scale: 1.719 arcsec/pixel

Orientation: 1.122 degrees

Field radius: 0.673 degrees

Locations: Mapleton Lateral Observatory, Mapleton, Utah, United States

Data source: Backyard

Description

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.

Comments

Author

dvdearden
David Dearden
License: None (All rights reserved)
1891
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Revisions

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





    
        

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





    
        

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





    
        

            David Dearden
    C

B

SHO version

C

LHGB version

Sky plot

Sky plot

Histogram

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





    
        

            David Dearden