NGC 3198
Also Known as: Herschel 146, UGC 5572
Object Type: Barred Spiral Galaxy
Constellation: Ursa Major
Distance from Earth: 47 million light years
Apparent Magnitude: 10.3
Coordinates: RA 10H 19M 54.99S DEC 45 deg 32 min 58.88 sec
Radius: 8.5’ x 3.3’
Actual Size: 79,900 light years in diameter
Apparent Dimensions: 7.4 arc-minutes x 6.9 arc-minutes
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Environmental Data
Date: May 13, 2021 Start Time: 9:25PM End Time: 2:24AM SQM: 17.87
Moon Age: 1.8 days Moonset: 9:55PM Moon Illumination: 3.4%
Temperature: 60 degrees F Humidity: 50% Dew Point: 41 degrees F
Location: Westport, Massachusetts 02790 Sky Condition: Clear
Comment:
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Imaging Scope Data
Mount: Celestron CPC1100 mount Camera: ZWO ASI071 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: 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 2.35 Platesolve: Success on 5th attempt
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Guide Scope Data
Telescope: Stellarvue SVX130 refractor Camera: Lodestar X2 Focuser: Optec DirectSync SV35
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: 143 Duration: 2 minutes Gain: Unity Gain
Camera Temperature: -10 degrees C Binning: 1x1 F-Stop: 7.0
Total Integration Time: 4.77 hours
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Number of flat frames: 50 Duration: 0.13 Gain: Unity Gain
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: 15 Duration: 2 minutes Gain: Unity Gain
Camera Temperature: -10 degrees C Binning: 1x1 F-Stop: 7.0
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Number of Bias frames: 15 Duration: 0.001 seconds Gain: Unity Gain
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, MultiscaleLinearTransform for sharpening, CurvesTransformation, DynamicCrop
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Notes:
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