NGC 6820 and NGC 6823
Also Known as: Sh2-86
Object Type: Reflection Nebula (NGC 6820), Open Cluster (NGC 6823)
Constellation: Vulpecula
Distance from Earth: 6,000Light years
Apparent Magnitude: 10.06 (NGC 6820), 7.1 (NGC 6823)
Coordinates: RA 19H 42M 27.92S DEC 23deg 05min 14.7sec
Actual Size: 50 light years in diameter (NGC 6823)
Apparent Dimensions: 40 arc-minutes (NGC 6823)
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Environmental Data
Date: June 10, 2024 Start Time: 9:45PM End Time: 4:16AM SQM: 19.06
Moon Age: 4.3 days Moonculmination: 4:31PM Moon Illumination: 19.9%
Temperature: 66 degrees F Humidity: 79% Dew Point: 60 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: Pegasus Falcon Rotator 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 2.86 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: 2 sec Binning: 1x1 Tracking Result: 0.68 arc-seconds RMS
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Images Taken
Number of light frames: 91 Duration: 4 minutes Gain: 100
Camera Temperature: 0 degrees C Binning: 1x1 F-Stop: 7.0
Total Integration Time: 6.07 hours
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Number of flat frames: 50 Duration: 0.05 seconds Gain: 100
Camera Temperature: 0 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:100
Camera Temperature: 0 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: 0 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: AutomaticBackgroundExtraction, SpectroPhotometricColorCalibration, BlurXterminator, NoiseXterminator, StarXterminator
Non-Linear:
StarsOnly: HistogramTransformation
Starless: GeneralizedHyperbolicStretch script, CurvesTransformation, MultiscaleLinearTransform for sharpening, CurvesTransformation color saturation, MultiscaleLinearTransform for smoothing, CurvesTransformation to enhance blue.
PixelMath to combine Stars only and Starless images, saturation for Red
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Notes:
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