NGC 772 and NGC 770
Common Name: Fiddlehead Galaxy (NGC 772)
Also Known as: PGC 7525, UGC 1466, Arp 78 (NGC 772), UGC 1463, PGC 7517 (NGC 770)
Object Type: Unbarred Spiral Galaxy (NGC 772), Elliptical (NGC 770)
Constellation: Aries
Distance from Earth: 105.7 million light years (NGC 772), 120 million light years (NGC 770)
Apparent Magnitude: 11.4 (NGC 772), 13.49 (NGC 770)
Coordinates: RA 01H 59M 19.5443S DEC 19 deg 00 min 27.751 sec (NGC 772), RA 01H 59M 13.6426S DEC 18 deg 57 min 16.7211 sec (NGC 770)
Actual Size: 200,000 light years in diameter (NGC 772), 36,000 light years (NGC 770)
Apparent Dimensions: 7.2 arc-minutes x 4.3 arc-minutes (NGC 772), 0.587 arcminutes x 0.399 arcminutes (NGC 770)
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Environmental Data
Date: November 24, 2025 Start Time: 5:46PM End Time: 2:32AM SQM: 19.39
Moon Age: 3.9 days Moonset: 5:46PM Moon Illumination: 16.5%
Temperature: 40.3 degrees F Humidity: 63% Dew Point: 28.8 degrees F
Location: Westport, Massachusetts 02790 Sky Condition: Clear
Comment:
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Imaging Scope Data
Mount: iOptron CEM120 Camera: ZWO ASI2600 monochrome Focuser: Optec QuickSync FT20
Telescope: Celestron 11 inch SCT Edge Focal Length: 2800mm
Focal Reducer/Field Flattener: None Dew Heater: Kendrick dew strip
Filter Wheel : ZWO EFW 7 position 2 inch Filter(s): Baader Lum CMOS optimized 2 inch, Baader RED CMOS optimized 2 inch, Baader GREEN CMOS optimized 2 inch, Baader BLUE CMOS optimized 2 inch
Rotator: Pegasus Falcon 2 Power Control: Pegasus Ultimate Powerbox V2
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 4.5 Platesolve: Success on 3rd attempt
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Guide Scope Data
Telescope: Stellarvue SVX130 refractor Camera: ZWO ASI290 mono Focuser: Optec DirectSync SV35
Dew Heater: Kendrick dew strip Software: PHD2 Exposure: 2 sec Binning: 1x1 Tracking Result: 0.54 to 0.8 arcseconds RMS
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Images Taken
Number of light frames (LUM): 110 Duration: 2 minutes Gain: 100
Number of light frames (Red): 35 Duration: 2 minutes Gain: 100
Number of light frames (Green): 35 Duration: 2 minutes Gain: 100
Number of light frames (Blue: 35 Duration: 2 minutes Gain: 100
Camera Temperature: -10 degrees C Binning: 1x1 F-Stop: 10.0
Total Integration Time: 7.17 hours
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Number of flat frames (LUM): 25 Duration: 0.12 Gain:100
Number of flat frames (Red): 25 Duration: 0.35 Gain: 100
Number of flat frames (Green): 25 Duration: 0.26 Gain: 100
Number of flat frames (Blue): 25 Duration: 0.49 Gain: 100
Flat Field Illumination: All-Pro 'Spike-a-Flat Field standard' illuminated panel set to 75%
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Number of Dark frames: 50 (from library) Duration: 2 minutes Gain: 100
Number of Bias frames: 50 (from library) Duration: 0.001 seconds Gain: 100
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Imaging Processing
Imaging Processing Software: PixInsight
Processes utilized: Linear - calibration/integration:
For each of the LUM, RED, GREEN, and BLUE lights: Flats ImageCalibration with Master Bias, Flat ImageIntegration, Images ImageCalibration with Flat Master & Dark Master, SubFrameSelector
StarAlign all calibrated lights using best LUM image as reference, ImageIntegration of each of the LUM, RED, GREEN, and BLUE sets
Linear - Background extraction, Color correction, deconvolution, noise reduction:
LUM DynamicCrop, GraXpert, BlurXTerminator, NoiseXterminator
RED/GREEN/BLUE DynamicCrop, GraXpert, ChannelCombination to create color image using only Red/Green/Blue, ImageSolver script, SpectroPhotometricColorCalibration, BlurXTerminator, NoiseXterminator
Non-Linear:
LUM: GeneralizedHyperbolicStretch script, MultiScaleLinearTransform to sharpen, CurvesTransformation.
COLOR: GeneralizedHyperbolicStretch script, CurvesTransformation to darken
ImageBlend to add Lum and Color images, MultiScaleLinearTransform to sharpen, GAME script to create mask, CurvesTransformation to darken background.
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Notes:
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