IC 5146
Common Name: Cocoon Nebula
Also Known as: Caldwell 19, Sharpless 2-125 (Sh2-125).
Object Type: Emission Nebula
Constellation: Cygnus
Distance from Earth: 2,500 light years
Apparent Magnitude: 7.2
Coordinates: RA 21H 53M 28.7S DEC 47 deg 16 min 01 sec
Actual Size: 15 light years light years in diameter
Apparent Dimensions: 12 arc-minutes
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Environmental Data
Date: October 1, 2021 Start Time: 7:30PM End Time: 1:53AM SQM: 18.78
Moon Age: 24.4 days Moonrise: 0:52AM Moon Illumination: 26.9%
Temperature: 58 degees F Humidity: 74% Dew Point: 50 degrees F
Location: Westport, Massachusetts 02790 Sky Condition: Clear
Comment:
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Imaging Scope Data
Mount: iOptron CEM120 Camera: ZWO ASI2600 OSC Focuser: Optec QuickSync FT20
Telescope: Celestron 11 inch SCT Edge Focal Length: 1960mm
Focal Reducer/Field Flattener: 0.7 focal reducer Filter: None
Rotator: Fixed Power Control: Pegasus Ultimate Powerbox V2 Dew Heater: Kendrick dew strip
Imaging Software
Mount: iOptron Commander Focuser: Optec FocusLynx Commander
Imaging: Sequence Generator Pro Platesolve: ASTAP Rotator/Control: Pegasus Unity Platform
Imaging Status
Imaging Software: Sequence Generated Focus HFR 2.02 Platesolve: Good on 3rd attempt
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Guide Scope Data
Telescope: Stellarvue SV90 refractor Camera: ZWO ASI290 Focuser: Optec DirectSync SVX30
Dew Heater: Kendrick dew strip Software: PHD2 Exposure: 1 sec Binning: 1x1 Tracking Result: 0.65 arc-seconds RMS
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Images Taken
Number of light frames: 89 Duration: 4 minutes Gain: 100
Camera Temperature: -10 degrees C Binning: 1x1 F-Stop: 7.0
Total Integration Time: 5.93 hours
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Number of flat frames: 50 Duration: 0.15 seconds Gain: 100
Camera Temperature: -10 degrees C Binning: 1x1 F-Stop: 7.0
Flat Field Illumination: All-Pro 'Spike-a-Flat Field standard' illuminated panel
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Number of Dark frames: 50 (from library) Duration: 4 minutes Gain:U100
Camera Temperature: -10 degrees C Binning: 1x1 F-Stop: 7.0
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Number of Bias frames: 50 (from library) Duration: 0.001 seconds Gain: 100
Camera Temperature: -10 degrees C Binning: 1x1 F-Stop: 7.0
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Imaging Processing
Imaging Processing Software: PixInsight
Processes utilized: Linear - calibration/integration: Flats ImageCalibration with Master Bias, Flat ImageIntegration, Images ImageCalibration with Flat Master & Dark Master, Debayer, SubFrameSelector, StarAlign, ImageIntegration.
Linear - Background extraction, Color correction, deconvolution, noise reduction: DynamicBackgroundExtraction, ImageSolve, SpectroPhotometricColorCalibration, BlurXTerminator, NoiseXterminator, StarXterminator
Non-Linear:
Stars-only image: HistogramTransformation
Starless image: GeneralizedHyperbolicStretch script
ImageBlend script to combine stars only and starless images, MultiscaleLinearTransform for sharpening, HDRMultiscaleTransform, CurvesTransformation to enhance blues
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Notes: Clouds at 2AM
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