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, 2019 , Dec. 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
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
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
Description: Added a second night of data. 55 x 450 HA 30 x 450 S2 27 x 450 O2
Description: 20191226 Revision - Less aggressive stretch and coloring.
Description: Re balanced to more red hue.
Description: resize, dehaze
Description: Rainbow-Rosette
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.
| Central USA |
| Cloudy Nights |
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