Messier 52 (M52) & NGC 7635
Also Known as: NGC 7654 (M52), Collinder 455 (M52), Sharpless 162 (Sh2-162) (NGC 7635), Caldwell 11 (NGC 7635)
Object Type: Open Cluster (M52), Emission Nebula (NGC 7635)
Constellation: Cassiopeia
Distance from Earth: 4,600 light years (M52), 7,100 light years (NGC 7635)
Apparent Magnitude: 6.9 (M52), 10.0 (NGC 7635)
Coordinates: RA 23H 24M 48S DEC 61 deg 35 min 36 sec (M52), RA 22H 20M 48.3S DEC 61 deg 12 min 06 sec (NGC 7635)
Actual Size: 22 light years in diameter (M52), 7 light years in diameter (NGC 7635)
Apparent Dimensions: 13 arc-minutes (M52), 15 arc-minutes x 8 arc-minutes (NGC 7635)
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Environmental Data
Date: November 24, 2020 Start Time: 5:56PM End Time: 10:56 PM SQM:
Moon Age: 10.0 days Moonset: 0:56AM Moon Illumination: 76.0%
Temperature: Humidity: Dew Point:
Location: Westport, Massachusetts 02790 Sky Condition:
Comment:
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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: Pegasus Ultimate Powerbox V2 Dew Heater: Kendrick dew strip
Imaging Software
Mount: iOptron Commander Focuser: Optec FocusLynx Commander
Imaging: Sequence Generator Pro Platesolve: Platesolve 2 Rotator/Control: Pegasus Unity Platform
Imaging Status
Imaging Software: Sequence Generated Focus HFR: 1.23 Platesolve: Good on 2nd attempt
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Guide Scope Data
Telescope: Stellarvue SV90 refractor Camera: Lodestar Focuser: Optec DirectSync SVX30
Dew Heater: Kendrick dew strip Software: PHD2 Tracking Result: 0.78 arc-seconds RMS
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Images Taken
Number of light frames: 144 Duration: 2 minutes Gain: 0
Camera Temperature: -20 degrees C Binning: 1x1 F-Stop: 7.0
Total Integration Time: 4.8 hours
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Number of flat frames: 40 Duration: 0.08 seconds Gain: 0
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: 0
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: 0
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: AutomaticBackgroundExtraction, ImageSolve, SpectroPhotometricColorCalibration, BlurXTerminator, NoiseXterminator, StarXterminator, DynamicCrop
Non-Linear:
Stars Only image: HistogramTransformation
Starless image only: GeneralizedHyperbolicStretch script, CurvesTransformation, MultiscaleLinearTransform to sharpen
PIxelMath to combine stars only image and starless image.
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Notes:
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