NGC 7640
Also Known as: UGC 12554, LEDA 71220
Object Type: Barred Spiral Galaxy
Constellation: Andromeda
Distance from Earth: 38.8 million light years
Apparent Magnitude: 11.1
Coordinates: RRA 23H 22M 06.58S DEC 40 deg 50 min 43.5 sec
Actual Size: 59,240 light years in diameter.
Apparent Dimensions: 10.5 arc-minutes x 2.0 arc-minutes
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Environmental Data
Date: November 3, 2022 Start Time: 7:55PM End Time: 1:27AM SQM: 19.49
Moon Age: 10.3 days Moonset: 1:43AM Moon Illumination: 79.1%
Temperature: 57 degrees F Humidity: 56% Dew Point: 42 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: 2.01 Platesolve: Good on 2nd 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: 147 Duration: 2 minutes Gain: 100
Camera Temperature: -10 degrees C Binning: 1x1 F-Stop: 7.0
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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: 2 minutes Gain: 100
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: DynamicCrop, namicBackgroundExtraction, ImageSolve, SpectroPhotometricColorCalibration, BlurXTerminator, NoiseXterminator
Non-Linear: GeneralizedHyperbolicStretch script, MultiScaleLinearTransform to sharpen, CurvesTransformation, HistogramTransformation, DynamicCrop
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Notes:
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