NGC 7662
Common Name: Blue Snowball
Also Known as: Caldwell 22, Snowball nebula
Object Type: Planetary Nebula
Constellation: Andromeda
Distance from Earth: 5,730 light years
Apparent Magnitude: 8.6
Coordinates: RA 23H 25M 54S DEC 42 deg 32 min 06 sec
Actual Size: 1.6 light years in diameter
Apparent Dimensions: 32 arc-minutes x 28 arc-minutes
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Environmental Data
Date: December 18, 19, 2022 Start Time: 7:46 / 5:30PM End Time: 12:01AM / 10:20PM SQM: 19.85 (Dec 18)
Moon Age: 25.2 days Moonrise: 2:36AM Moon Illumination: 19.3%
Temperature: 34 degrees F Humidity: 76% Dew Point: 27 degrees F
Location: Westport, Massachusetts 02790 Sky Condition: Clear
Comment: Started sequence on December 18. Saved the sequence and re-used on December 19
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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: None
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: 2.02 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: 0.9/1.1 arc-seconds RMS
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Images Taken
Number of light frames: 107/117 Duration: 2 minutes Gain: 100
Camera Temperature: -10 degrees C Binning: 1x1 F-Stop: 7.0
Total Integration Time: 7.47 hours
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Number of flat frames: 50/50 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: DynamicBackgroundExtraction, ImageSolve, SpectroPhotometricColorCalibration, BlurXTerminator, NoiseXterminator
Non-Linear: GeneralizedHyperbolicStretch script, MultiScaleLinearTransform to sharpen, CurvesTransformation, DynamicCrop
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Notes: Combined images from Dec 18 and Dec 19 during processing. Clouds at 10:30PM
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