Hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  B168  ·  Cocoon nebula  ·  IC 5146  ·  IC5146  ·  Sh2-125  ·  VdB147
Getting plate-solving status, please wait...
IC 5146, Cocoon Nebula, LRGB, 2-3 Sep 2018, 



    
        

            David Dearden
Powered byPixInsight

IC 5146, Cocoon Nebula, LRGB, 2-3 Sep 2018

Getting plate-solving status, please wait...
IC 5146, Cocoon Nebula, LRGB, 2-3 Sep 2018, 



    
        

            David Dearden
Powered byPixInsight

IC 5146, Cocoon Nebula, LRGB, 2-3 Sep 2018

Imaging telescopes or lenses: Astro-Tech AT8IN

Imaging cameras: ZWO ASI1600MM-Cool

Mounts: Skywatcher NEQ-6 Pro Synscan

Guiding telescopes or lenses: Astro-Tech AT8IN

Guiding cameras: Meade DSI II C

Focal reducers: High Point Scientific Coma Corrector Photo & Visual For Netwonian Telescopes 2"

Software: photoshop  ·  DeepSkyStacker  ·  Silicon Fields StarTools 1.3  ·  Noel Carboni's Astro Tools for PhotoShop  ·  AstroPlanner  ·  PHD2 Guiding  ·  Sequence Generator Pro  ·  EQASCOM

Filters: ZWO Red 31 mm  ·  ZWO Luminance 31 mm  ·  ZWO Green 31 mm  ·  ZWO Blue 31 mm

Accessory: Orion Thin Off Axis Guider (TOAG)  ·  Robert Brown's Arduino ASCOM Focuser Pro DIY  ·  ZWO EFW filter wheel


Dates:Aug. 31, 2018Sept. 1, 2018

Frames:
ZWO Blue 31 mm: 20x180" (1h) (gain: 139.00) -20C bin 1x1
ZWO Green 31 mm: 20x180" (1h) (gain: 139.00) -20C bin 1x1
ZWO Luminance 31 mm: 59x180" (2h 57') (gain: 139.00) -20C bin 1x1
ZWO Red 31 mm: 20x180" (1h) (gain: 139.00) -20C bin 1x1

Integration: 5h 57'

Avg. Moon age: 19.99 days

Avg. Moon phase: 72.02%

Bortle Dark-Sky Scale: 5.00


Astrometry.net job: 2232583

RA center: 21h 52' 59"

DEC center: +47° 16' 49"

Pixel scale: 1.718 arcsec/pixel

Orientation: -6.281 degrees

Field radius: 0.695 degrees


Resolution: 2306x1782

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

Data source: Backyard

Description

Miraculously, I got another clear night. I decided it had been a while since I had imaged the Cocoon Nebula, and I had never done it with this camera, so I decided to give it a try. The Moon was far enough gone I also decided it was worth trying LRGB rather than narrowband, and this is the result. It’s much better than my best previous image of this target; I was happy to see some of the dark dust lane showing up around the nebula.

Date: 2-3 Sep 2018

Subject: IC 5146, Cocoon Nebula

Scope: AT8IN+High Point Scientific Coma Corrector

Filters: ZWO 31 mm diameter unmounted LRGB

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

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

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

Acquisition: Sequence Generator Pro 3.0.2.94

Exposure: 59x300 L, 20x300 R, G, & B

Stacking: Deep Sky Stacker 4.1.1 (64-bit) dark+flat+bias, κ-σ stacking with κ = 1.5.

Processing: StarTools 1.4.332: Combined R, G, & B in StarTools. Cropped and wiped (vignetting), applied default color module settings except used “cap green to yellow”. Denoised without any deconvolution. Cropped and wiped L data the same way and deconvoluted before using untrack denoising. In Photoshop, used “shrink stars” liberally on the L data (otherwise the stars were pretty badly saturated). Used L on the RGB, and boosted the saturation a bit. Used several rounds of “increase star color” to even out the color in the stars. Deep space noise reduction, then AstroFrame.

Comments

Sky plot

Sky plot

Histogram

IC 5146, Cocoon Nebula, LRGB, 2-3 Sep 2018, 



    
        

            David Dearden