Messier 39 (M39)
Also Known as: NGC 7092, Collinder 438
Object Type: Open Cluster
Constellation: Cygnus
Distance from Earth: 824.4 light years
Apparent Magnitude: 5.5
Coordinates: RA 21H 31M 42S DEC 48 deg 25 min 0 sec
Actual Size: 28 light years in diameter
Apparent Dimensions: 32 arc-minutes
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Environmental Data
Date: November 1, 2021 Start Time: 7:10PM End Time: 10:24PM SQM: 19.21
Moon Age: 25.8 days Moonrise: 3:05AM Moon Illumination: 14.6%
Temperature: 50 degrees F Humidity: 65% Dew Point: 40 degrees F
Location: Westport, Massachusetts 02790 Sky Condition: Clear, clouds coming later
Comment: PHD2 calibration good. Guiding Assistant used to fine tune guiding parameters.
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Imaging Scope Data
Mount: iOptron CEM120 Camera: ZWO ASI2600 OSC Focuser: Optec DirectSync SV35
Telescope: Stellarvue SVX130 refractor Focal Length: 910mm
Focal Reducer/Field Flattener: Field Flattener Filter: None
Rotator: Pegasus Falcon 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 Good HFR 1.49 Platesolve: Success on 3rd attempt
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Guide Scope Data
Telescope: Stellarvue SV90 refractor Camera: Lodestar X2 Focuser: Optec DirectSync SVX30
Dew Heater: Kendrick dew strip Software: PHD2 Exposure: 1 sec Binning: 1x1 Tracking Result: 0.7 arc-seconds RMS
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Images Taken
Number of light frames: 90 Duration: 2 minutes Gain: 100
Camera Temperature: -10 degrees C Binning: 1x1 F-Stop: 7.0
Total Integration Time: 3 hours
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Number of flat frames: 53 Duration: 0.1 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, AutomaticBackgroundExtraction, ImageSolve, SpectroPhotometricColorCalibration, BlurXTerminator
Non-Linear: GeneralizedHyperbolicStretch script, NoiseXterminator
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Notes:
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