NGC 2775
Also Known as: Caldwell 48, PGC 25861, UGC 4820
Object Type: Spiral Galaxy
Constellation: Cancer
Distance from Earth: 67 million light years
Apparent Magnitude: 10.4
Coordinates: RA 09H 10M 20.112S DEC 07 deg 02 min 16.53 sec
Actual Size: 83,805 light years
Apparent Dimensions: 4.3 arcminutes x 3.3 arcminutes
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Environmental Data
Date: March 10, 2026 Start Time: 7:57 PM End Time: 4.01 AM SQM: 18.15
Moon Age: 21.1 days Moonrise: 1:30AM Moon Illumination: 61.1%
Temperature: 46.2 degrees F Humidity: 78% Dew Point: 39.6 degrees F
Location: Westport, Massachusetts 02790 Sky Condition: Clear, slightly hazy
Comment: Previosuly install ASCOM 7.1.3 and Sequence Generator Pro 4.5
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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 4.81 Platesolve: Success 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: 0.59 to 0.9 arc-seconds RMS
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Images Taken
Number of light frames (LUM): 84 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: 6.3 hours
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Number of flat frames (LUM): 25 Duration: 0.12 Gain:100
Number of flat frames (Red): 25 Duration: 0.38 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
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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 GraXpert, BlurXTerminator, NoiseXterminator
RED/GREEN/BLUE GraXpert, ChannelCombine to create color image using only Red/Green/Blue, BlurXTerminator, NoiseXterminator, ImageSolve, SpectroPhotometricColorCalibration
Non-Linear:
LUM: MultiscaleAdaptiveStretch, CurvesTransformation
Color:MultiscaleAdaptiveStretch, CurvesTransformation
ImageBlend script to combine LUM and COLOR masters, CurvesTransformation
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Notes:
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