NGC 797 and NGC 801
Also Known as: UGC 1541 (NGC 797) ... UGC 1550, PGC 7847 (NGC 801)
Object Type: Spiral Galaxies
Constellation: Andromeda
Distance from Earth: 220 million light years (NGC 797) ... 174 million light years (NGC 801)
Apparent Magnitude: 13.06 (NGC 797) .... 10.59 (NGC 801)
Coordinates: RA 02H 04M 56S DEC 38 deg 13 min 59 sec (NGC 797) ...RA 02H 03M 44.794S DEC 38 deg 15 min 31.624sec (NGC 801)
Actual Size: 189,200 light years in diameter (NGC 801)
Apparent Dimensions: 1.8 arc-minutes (NGC 797) ... 1.28 arc-minutes x 0.461 arc-minutes (NGC 801)
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Environmental Data
Date: November 26, 2024 Start Time: 6:10PM End Time: 1:54AM SQM: 19.77
Moon Age: 25.2days Moonrise: 02:11AM Moon Illumination: 19.2%
Temperature: 42.4 degrees F Humidity: 85% Dew Point: 38.3 degrees F
Location: Westport, Massachusetts 02790 Sky Condition: Clouds cleared at twilight
Comment: Clouds cleared at twilight but breezy.
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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: Optolong L-Pro
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 2.95 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 Exposure: 2 sec Binning: 1x1 Tracking Result: ~0.85 arc-seconds RMS
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Images Taken
Number of light frames: 201 Duration: 2 minutes Gain: 100
Camera Temperature: -10 degrees C Binning: 1x1 F-Stop: 7.0
Total Integration Time: 6.7 hours
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Number of flat frames: 52 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: GradientCorrection, ImageSolve, SpectroPhotometricColorCalibration, BlurXTerminator, NoiseXterminator
Non-Linear: GeneralizedHyperbolicStretch script, CurvesTransformation, DynamicCrop, MultiscaleLinearTransform for sharpening, GAME script to isolate galaxies, MultiscaleLinearTransform for sharpening galaxies only.
Notes:
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