Sharpless 101 (Sh2-101)
Common Name: Tulip Nebula
Also Known as: Cygnus star cloud
Object Type: Hii region Emission Nebula
Constellation: Cygnus
Distance from Earth: 6,000 Light years
Apparent Magnitude: 9.0
Coordinates: RA 20H 00M 29.37S DEC 35 deg 19 min 13.9 sec
Actual Size: 28 light years
Apparent Dimensions: 16 arc-minutes x 9 arc-minutes
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Environmental Data
Date: August 22, 2023 Start Time: 8:42PM End Time: 3:08AM SQM: 19.07
Moon Age: 5.9 days Moonset: 10:18PM Moon Illumination: 34.7%
Temperature: 66 degrees F Humidity: 82% Dew Point: 61 degrees F
Location: Westport, Massachusetts 02790 Sky Condition: Clear
Comment:
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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 PHD2 Exposure: 1 sec Binning: 1x1 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: 2 sec Binning: 1x1 Tracking Result: 0.7 arc-seconds RMS
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Images Taken
Number of light frames: 84 Duration: 5 minutes Gain: 100
Camera Temperature: -10 degrees C Binning: 1x1 F-Stop: 7.0
Total Integration Time: 7 hours
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Number of flat frames: 50 Duration: 0.16 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: 5 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, CurvesTransformation, StarReduction script. GAME script (mask), CurvesTransformation-enhance blue.
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Notes: Clouds at 11:30PM. Restarted when clouds thinned.
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