NGC 6992
Common Name: Eastern Veil Nebula
Also Known as: IC 1340, Cygnus Loop. Cirrus Nebula, Filamentary Nebula
Object Type: Supernova Remnant
Constellation: Cygnus
Distance from Earth: 2,400 light years
Apparent Magnitude: 7.0
Coordinates: RA 20H 45M 38S DEC 30 deg 42 min 30 sec
Actual Size: 130 light years in diameter.
Apparent Dimensions: 2 degrees.
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Environmental Data
Date: September 3, 2021 Start Time: 8:43PM End Time: 2:58AM SQM: 17.77
Moon Age: 26.1 days Moonrise: 2:06AM Moon Illumination: 13.1%
Temperature: 64 degrees F Humidity: 77% Dew Point: 57 degrees F
Location: Westport, Massachusetts 02790 Sky Condition: Clear
Comment: Imaging 2 panel mosaic of Veil Nebula East. Took alternating panels of 10 x 4 minute exposures.
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Imaging Scope Data
Mount: iOptron CEM120 Camera: ZWO ASI071 OSC Focuser: Optec DirectSync SV35
Telescope: Stellarvue SVX130 refractor Focal Length: 910mm
Focal Reducer/Field Flattener: Field Flattener 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 1.27 Platesolve: Good on 2nd attempt
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Guide Scope Data
Telescope: Stellarvue SV90 refractor Camera: ZWO ASI290 Focuser: Optec DirectSync SVX30
Dew Heater: Kendrick dew strip Software: PHD2 Exposure: 1-2 sec Binning: 1x1 Tracking Result: 0.9 arc-seconds RMS
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Images Taken
Number of light frames: 79 Duration: 4 minutes Gain: Unity Gain
Camera Temperature: -10 degrees C Binning: 1x1 F-Stop: 7.0
Total Integration Time: 5.27 hours
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Number of flat frames: 50 Duration: 0.08 seconds 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: 50 (from library) Duration: 4 minutes Gain: Unity Gain
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: 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:
AutomaticBackgroundExtraction, DNALinear script
Panel 2:Flats ImageCalibration with Master Bias, Flat ImageIntegration, Images ImageCalibration with Flat Master & Dark Master, Debayer, SubFrameSelector, StarAlign, ImageIntegration,
AutomaticBackgroundExtraction, DNALinear script
AutoColor script, BlurXTerminator, NoiseXTerminator, StarXterminator
Non-Linear:
Stars-only image: HistogramTransformation
Starless image: GeneralizedHyperbolicStretch script, CurvesTransformation, MultiscaleLinearTransform for smoothing
PixelMatch to combine Stars-only and Starless images
CurvesTransformation of combined image
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Notes:
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