NGC 672 & IC 1727
Also Known as: Leda 6574 (IC 1727)
Object Type: Barred Spiral Galaxy (NGC 672), Irregular Galaxy (IC 1727)
Constellation: Triangulum
Distance from Earth: 23.42 million light years (NCG 672), 24.3 million light years (IC 1727).
Apparent Magnitude: 11.09 (NGC 627)
Coordinates: RA 01H 47M 54.47627S DEC 27 deg 25 min 57.9948 sec (NGC 672) ...RA 01H 47M 30S DEC 27 deg 20 Min (IC 1727)
Actual Size: 42,000 light years (NGC 672), 40,000 light years (IC 1727)
Apparent Dimensions: 6.17 arc-minutes x 2.29 arc-minutes (NGC 672) ... 5.7 arc-minutes x 2.4 arc-minutes (IC 1727)
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Environmental Data
Date: October 7, 2021 Start Time: 7:54PM End Time: 3:58AM SQM: 19.74
Moon Age: 1.4 days Moonset: 7:12PM Moon Illumination: 2.4%
Temperature: 64 degrees F Humidity: 80% Dew Point: 58 degrees F
Location: Westport, Massachusetts 02790 Sky Condition: Clear
Comment: PHD2 Guiding Assistant updated guiding parameters.
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Imaging Scope Data
Mount: iOptron CEM 120 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: Manual 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 3.34 Platesolve: Good on 5th attempt
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Guide Scope Data
Telescope: Stellarvue SV90 refractor Camera: ZWO ASI290 & Lodestar X2 Focuser: Optec DirectSync SVX30
Dew Heater: Kendrick dew strip Software: PHD2 Exposure: 2 sec Binning: 1x1 Tracking Result: 1.0 arc-seconds RMS
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Images Taken
Number of light frames: 181 Duration: 2 minutes Gain: 100
Camera Temperature: -10 degrees C Binning: 1x1 F-Stop: 7.0
Total Integration Time: 6.03 hours
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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, DynamicBackgroundExtraction, ImageSolve, SpectroPhotometricColorCalibration, BlurXTerminator, NoiseXterminator
Non-Linear: GeneralizedHyperbolicStretch script, CurvesTransformation, MultiscaleLinearTransform for sharpening HistogramTransformation
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Notes: ZWO ASI290 stopped working during imaging and was replaced with Lodestar X2.
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