Messier 92 (M92)
Also Known as: NGC 6341
Object Type: Globular Cluster
Constellation: Hercules
Distance from Earth: 26,700 light years
Apparent Magnitude: 6.3
Coordinates: RA 17H 17M 07.39S DEC 43 deg 08 min 09.4 sec
Actual Size: 108,000 light years in diameter
Apparent Dimensions: 14 arc-minutes
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Environmental Data
Date: July 10, 2021 Start Time: 10:46PM End Time: 2:23AM SQM: 16.77
Moon Age: 0.6 days Moonset: 9:14PM Moon Illumination: 0.6%
Temperature: 74 degrees F Humidity: 70% Dew Point: 64 degrees F
Location: Westport, Massachusetts 02790 Sky Condition: Clear
Comment:
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Imaging Scope Data
Mount: iOptron CEM120 Camera: ZWO ASI071 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: None Power Control: None Dew Heater: Kendrick dew strip
Imaging Software
Mount: iOptron Commander Focuser: Optec FocusLynx Commander
Imaging: Sequence Generator Pro Platesolve: Platesolve2 Rotator/Control:
Imaging Status
Imaging Software: Sequence Generated Focus HFR 3.04 Platesolve: Success on 2nd attempt
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Guide Scope Data
Telescope: Stellarvue SV90 refractor Camera: Lodestar X2 Focuser: Optec DirectSync SVX30
Dew Heater: Kendrick dew strip Software: PHD2 Exposure: - sec Binning: 1x1 Tracking Result:
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Images Taken
Number of light frames: 97 Duration: 2 minutes Gain: Unity Gain
Camera Temperature: 0 degrees C Binning: 1x1 F-Stop: 7.0
Total Integration Time: 3.23 hours
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Number of flat frames: 50 Duration: 0.08 seconds Gain: Unity Gain
Camera Temperature: 0 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: Unity Gain
Camera Temperature: 0 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: 0 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: DynamicCrop, DynamicBackgroundExtraction, ImageSolve, SpectroPhotometricColorCalibration, BlurXTerminator, NoiseXterminator
Non-Linear: GeneralizedHyperbolicStretch script, HistogramTransformation, CurvesTransformation, DynamicCrop.
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Notes: Upgraded to SequenceGeneratorPro ver 4
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