NGC 188
Also Known as: Caldwell 1
Object Type: Open Cluster
Constellation: Cepheus
Distance from Earth: 5,400 Light years
Apparent Magnitude: 10.0
Coordinates: RA 00H 48M 26S DEC 65deg 15.3min 0sec
Actual Size: 23.6 light years in diameter
Apparent Dimensions: 15 arc-minutes x 15 arc-minutes
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Environmental Data
Date: January 10, 2021 Start Time: End Time: SQM: 20.03
Moon Age: 26.7 days Moonrise: 4:36AM Moon Illumination: 8.7%
Temperature: 36 degrees F Humidity: 55% Dew Point: 21.4 degrees F
Location: Westport, Massachusetts 02790 Sky Condition: Clear
Comment: Clouds forecast
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Imaging Scope Data
Mount: iOptron CEM120 Camera: ZWO ASI071 OSC Focuser: Optec DirectSync SV35
Telescope: Stellarvue SVX130 refractor Focal Length: 910mm
Focal Reducer/Field Flattener: Field Flattener Filter: None
Rotator: Pegasus Falcon rotator Power Control: None 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 1.23 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: 0.33 arc-seconds RMS with wind spikes
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Images Taken
Number of light frames: 77 Duration: 2 minutes Gain: Unity Gain
Camera Temperature: -20 degrees C Binning: 1x1 F-Stop: 7.0
Total Integration Time: 2.57 hours
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Number of flat frames: 40 Duration: 0.08 Gain: Unity Gain
Camera Temperature: -20 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: 2 minutes Gain: Unity Gain
Camera Temperature: -20 degrees C Binning: 1x1 F-Stop: 7.0
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Number of Bias frames: 50 (from library) Duration: 0.001 seconds Gain: Unity Gain
Camera Temperature: -20 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: DynamicCrop, DynamicBackgroundExtraction, ImageSolve, SpectroPhotometricColorCalibration, BlurXTerminator, NoiseXTerminator
Non-Linear: GeneralizedHyperbolicStretch script, CurvesTransformation, MultiScaleLinearTranform for sharpening
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Notes:
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