Imaging telescopes or lenses: GSO 8" f/5 Newton
Imaging cameras: ZWO ASI 183 MM PRO
Mounts: SkyWatcher NEQ6 Pro Goto
Guiding telescopes or lenses: GSO 8" f/5 Newton
Guiding cameras: Astrolumina Alccd5L-IIc
Focal reducers: Pal Gyulai GPU Aplanatic Koma Korrector 4-element
Software: PhotoShop CS5 · PHD2 Guiding · FitsWork 4 · DeepSky Stacker Deep Sky Stacker 3.3.4 · CCDCiel
Filters: Baader R 1.25'' CCD Filter · Baader B 1.25'' CCD Filter · Baader G 1.25'' CCD Filter
Accessory: TSOptics TS Off Axis Guider - 9mm
Astrometry.net job: 2682707
RA center: 21h 53' 28"
DEC center: +47° 15' 34"
Pixel scale: 0.494 arcsec/pixel
Orientation: 3.517 degrees
Field radius: 0.425 degrees
Resolution: 5119x3511
Locations: Nürnberg, Nürnberg, Bayern, Germany
Data source: Backyard
This is a rework of my Cocoon Nebula from 2018.
Dates:July 13, 2018, July 14, 2018, July 16, 2018
Frames:
Baader B 1.25'' CCD Filter: 23x240" (gain: 53.00) -20C bin 1x1
Baader G 1.25'' CCD Filter: 23x240" (gain: 53.00) -20C bin 1x1
Baader L 1.25'' Filter: 56x240" (gain: 53.00) -20C bin 1x1
Baader R 1.25'' CCD Filter: 23x240" (gain: 53.00) -20C bin 1x1
Integration: 8.3 hours
Darks: 29
Flats: 27
Bias: 100
Object description (wikipedia.org) :
IC 5146 (also Caldwell 19, Sh 2-125, and the Cocoon Nebula) is a reflection/emission nebula and Caldwell object in the constellation Cygnus. The NGC description refers to IC 5146 as a cluster of 9.5 mag stars involved in a bright and dark nebula. The cluster is also known as Collinder 470. It shines at magnitude +10.0/+9.3/+7.2. Its celestial coordinates are RA 21h 53.5m, dec+47° 16′. It is located near the naked-eye star Pi Cygni, the open cluster NGC 7209 in Lacerta, and the bright open cluster M39. The cluster is about 4,000 ly away, and the central star that lights it formed about 100,000 years ago; the nebula is about 12 arcmins across, which is equivalent to a span of 15 light years.
When viewing IC 5146, dark nebula Barnard 168 (B168) is an inseparable part of the experience, forming a dark lane that surrounds the cluster and projects westward forming the appearance of a trail behind the Cocoon.
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