Messier 35 (M35)
Also Known as: NGC 2168, Collinder 82
Object Type: Open Cluster
Constellation: Gemini
Distance from Earth: 2,800 light years
Apparent Magnitude: 5.3
Coordinates: RA 06H 09.1M 0S DEC 24 deg 21 min 0 sec
Radius: 22 light years in diameter
Apparent Dimensions: 28 arc-minutes
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Environmental Data
Date: March 21, 2020 Start Time: 9:20PM End Time: 10:28PM SQM: 17.40
Moon Age: 27.1 days Moonrise: 5:55AM Moon Illumination: 7.1%
Temperature: 52 degrees F Humidity: 55% Dew Point: 36 degrees F
Location: Westport, Massachusetts 02790 Sky Condition: Clear
Comment: PHD2 calibration good. Completed PHD2 drift alignment.
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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: None Power Control: None Dew Heater: Kendrick dew strip
Imaging Software
Mount: iOptron Commander Focuser: Optec FocusLynx Commander
Imaging: Sequence Generator Pro Platesolve: None Rotator/Control:
Imaging Status
Imaging Software: Sequence Generated Focus Good HFR 1.8 Platesolve:
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Guide Scope Data
Telescope: Stellarvue SV90 refractor Camera: LodestarX2 Focuser: Optec DirectSync SVX30
Dew Heater: Kendrick dew strip Software: PHD2 Tracking Result: 0.87 arc-seconds RMS
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Images Taken
Number of light frames: 30 Duration: 1 minute Gain: HDR
Camera Temperature: -10 degrees C Binning: 1x1 F-Stop: 7.0
Total Integration Time: 0.5 hours
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Number of flat frames: 20 Duration: 0.2 seconds Gain: HDR
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: 1 minute Gain: HDR
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: HDR
Camera Temperature: -20 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, AutomaticBackgroundExtraction, EzDenoise script, AutoColor script
Non-Linear: HistogramTransformation, EzStarReduction script, RangeSelectMask, HistogramTransformation on background
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Notes:
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