NGC 7000
Common Name: North American Nebula
Also Known as: Sharpless 117 (Sh2-117), Caldwell 20
Object Type: Emission Nebula
Constellation: Cygnus
Distance from Earth: 2,590 light years
Apparent Magnitude: 4.0
Coordinates: RA 20H 59M 17.1S DEC 44 deg 31 min 44 sec
Actual Size:
Apparent Dimensions: 120 arc-minutes x 100 arc-minutes
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Environmental Data
Date: July 31, 2021 Start Time: 8:24PM End Time: 3:43AM SQM: 14.43
Moon Age: 22.0 days Moonset: 1:27PM Moon Illumination: 51.4%
Temperature: 72 degrees F Humidity: 62% Dew Point: 58 degrees F
Location: Westport, Massachusetts 02790 Sky Condition: Clear
Comment:
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Imaging Scope Data
Mount: iOptron CEM120 Camera: ZWO ASI071 OSC Focuser: Optec DirectSync SVX30
Telescope: Stellarvue SV90 refractor Focal Length: 504mm
Focal Reducer/Field Flattener: 0.8 Filter: None
Rotator: Manual Power Control: Dew Heater: Kendrick dew strip
Imaging Software
Mount: iOptron Commander Focuser: Optec FocusLynx Commander
Imaging: Sequence Generator Pro Platesolve: ASTAP Rotator/Control:
Imaging Status
Imaging Software: Sequence Generated Focus HFR 1.15 Platesolve: Good on 6th attempt
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Guide Scope Data
Telescope: Stellarvue SVX130 refractor Camera: ZWO ASI290 Focuser: Optec DirectSync SV35
Dew Heater: Kendrick dew strip Software: PHD2 Tracking Result: 0.55 arc-seconds RMS
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Images Taken
Number of light frames: 54 Duration: 4 minutes Gain: Unity Gain
Camera Temperature: 0 degrees C Binning: 1x1 F-Stop: 5.6
Total Integration Time: 3.6 hours
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Number of flat frames: 52 Duration: 0.15 seconds Gain: Unity Gain
Camera Temperature: 0 degrees C Binning: 1x1 F-Stop: 5.6
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: Unity Gain
Camera Temperature: 0 degrees C Binning: 1x1 F-Stop: 5.6
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Number of Bias frames: 50 (from library) Duration: 0.001 seconds Gain: Unity Gain
Camera Temperature: 0 degrees C Binning: 1x1 F-Stop: 5.6
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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, ImageSolve, SpectroPhotometricColorCalibration, BlurXTerminator, NoiseXTerminator, StarXterminator
Non-Linear:
Stars-only image: HistogramTransformation
Starless image: GeneralizedHyperbolicStretch script, CurvesTransformation, MultiscaleLinearTransform for smoothing
PixelMatch to combine Stars-only and Starless images
CurvesTransfomration, DynamicCrop, CurvesTransformation for saturation
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Notes:
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