NGC 6934
Also Known as: Caldwell 47
Object Type: Globular Cluster
Constellation: Delphinus
Distance from Earth: 52,000 Light years
Apparent Magnitude: 8.83
Coordinates: RA 20H 34M 11.37S DEC 07 deg 24 min 16.1 sec
Actual Size: 107 light years
Apparent Dimensions: 7.1 arc-minutes
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Environmental Data
Date: September 4, 2024 Start Time: 7:55PM End Time: 12:11AM SQM: 18.14
Moon Age: 1.5 days Moonset: 7:38PM Moon Illumination: 2.6%
Temperature: 63 degrees F Humidity: 75% Dew Point: 60 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 DirectSync SV35
Telescope: Stellarvue SVX130 refractor Focal Length: 910mm
Focal Reducer/Field Flattener: Field Flattener Filter: None
Rotator: Pegasus Falcon 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 1.83 Platesolve: Success 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: 3 sec Binning: 1x1 Tracking Result: ~1.1 arc-seconds RMS
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Images Taken
Number of light frames: 104 Duration: 2 minutes Gain: 100
Camera Temperature: 0 degrees C Binning: 1x1 F-Stop: 7.0
Total Integration Time: 3.47 hours
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Number of flat frames: 50 Duration: 0.04 seconds Gain: 100
Camera Temperature: 0 degrees C Binning: 1x1 F-Stop: 7.0
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Number of Dark frames: 50 (from library) Duration: 2 minutes Gain: 100
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: 100
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: GradientCorrection, ImageSolve, SpectroPhotometricColorCalibration, BlurXterminator, NoiseXterminator, StarXterminator
Non-Linear: GeneralizedHyperbolicStretch script, HistogramTransformation, BlurXterminator, HistogramTransformation, DynamicCrop
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Notes:
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