Hemisphere:  Northern  ·  Contains:  NGC 2239  ·  NGC 2244  ·  Rosette nebula  ·  The star 12Mon
Rainbow Rosette (SHO), 



    
        

            Jonathan Young
Rainbow Rosette (SHO)
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Rainbow Rosette (SHO)

Technical card

Imaging telescopes or lenses: TEC 140 APO ED

Imaging cameras: ZWO ASI1600MM-Cool

Mounts: AZ-EQ6

Guiding telescopes or lenses: TEC 140 APO ED

Guiding cameras: QHY5L-II

Focal reducers: Astro-Physics QUAD TCC 0.72x

Software: PHD Lab Phd 2.6.3  ·  Seqence Generator Pro  ·  StarTools v1.4.316

Filters: Astrodon Ha 5nm 36 mm  ·  Astrodon 36mm SII 5nm

Accessory: Celestron OAG  ·  Starizona Microtouch Autofocuser  ·  Starlight Xpress Filter-wheel 7x36mm


Dates:Dec. 21, 2019Dec. 22, 2019

Frames:
Astrodon 36mm SII 5nm: 30x450" (gain: 139.00) -10C
Astrodon Ha 5nm 36 mm: 55x450" (gain: 139.00) -10C
Astrodon Oiii 5nm 36mm: 27x450" (gain: 139.00) -10C

Integration: 14.0 hours

Darks: ~36

Flats: ~16

Flat darks: ~16

Avg. Moon age: 25.14 days

Avg. Moon phase: 20.49%

Bortle Dark-Sky Scale: 5.00


Basic astrometry details

Astrometry.net job: 3173494

RA center: 6h 32' 2"

DEC center: +4° 57' 25"

Pixel scale: 0.920 arcsec/pixel

Orientation: 85.682 degrees

Field radius: 0.827 degrees


Resolution: 5000x4108

Locations: Backyard, Saline, Michigan, United States

Data source: Backyard

Description

Rosette Nebula / Caldwell 49 at 5000 lr and 130 lr across - 14 hours over two nights with 5nm narrow-band filters.

Processed in star-tools 1.6 (Dev - contrast - decon - sharp -HDR - color (SHO) and minimal de-noise. Colors (each channel hue) and saturation tweaked in LR. Struggled a bit with star control and over saturation but finally got a "Rainbow" from outer edge to core. Thanks for looking.

55 x 450 Ha
30 x 450 S2
27 x 450 O3
60 Dark
16 Flat / Darkflat

Comments

Author

TurbulentMedium
Jonathan Young
License: None (All rights reserved)
2094
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Revisions

  • Rainbow Rosette (SHO), 



    
        

            Jonathan Young
    Original
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  • Rainbow Rosette (SHO), 



    
        

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  • Final
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  • Rainbow Rosette (SHO), 



    
        

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B

Description: Added a second night of data. 55 x 450 HA 30 x 450 S2 27 x 450 O2

E

Description: 20191226 Revision - Less aggressive stretch and coloring.

F

Description: Re balanced to more red hue.

G

Description: resize, dehaze

H

Description: Rainbow-Rosette

L

Description: Reprocessed with tweaks to exposure, bin, color etc. DSS average stack 3x drizzle integration Compose: L, S, H, O with weightings Bin to 2.2 arc/pixel (17.67%) Develop 93% Contrast strength 70% DECON 1.5pixels Sharp (scale small) amount 200% HDR reveal all. 500 scale, strength 1.1 pixels Color - constancy, SHO, initial identity, 200% saturation, full dark sat, 4.0 light sat. Denoise - 2 pixels, scale corr 3, smooth 65%, brightness/color loss 20%. Touchup in LR (exposure +0.2, contrast +10, shadow/highlight -10, clarity/dehase 10, saturation/vibrance 10, tint -5, temp -5, denoise 10, grain 2). Rescale to 5000 pixel on long side.

Sky plot

Sky plot

Histogram

Rainbow Rosette (SHO), 



    
        

            Jonathan Young

In these public groups

Central USA
Cloudy Nights