Messier 85 (M85)
Also Known as: NGC 4382
Object Type: Elliptical Galaxy
Constellation: Coma Berenices
Distance from Earth: 60 million light years
Apparent Magnitude: 10.0
Coordinates: RA 12H 25M 24.0S DEC 18 deg 11 min 28 sec
Actual Size: 125,000 light years in diameter
Apparent Dimensions: 17.1 arc-minutes x 5.5 arc-minutes
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Environmental Data
Date: May 25, 2022 Start Time: 9:03PM End Time: 1:05AM SQM: 12.64
Moon Age: 24.9 days Moonrise: 3:04AM Moon Illumination: 22.4%
Temperature: 57 degrees F Humidity: 63% Dew Point: 45 degrees F
Location: Westport, Massachusetts 02790 Sky Condition: High thin clouds
Comment: PHD2 good calibration
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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 2.4 Platesolve: Success on 3rd 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: 0.84 arc-seconds RMS with spikes from wind
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Images Taken
Number of light frames: 108 Duration: 2 minutes Gain: 100
Camera Temperature: -10 degrees C Binning: 1x1 F-Stop: 7.0
Total Integration Time: 3.6 hours
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Number of flat frames: 50 Duration: 0.1 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: 2 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, MultiscaleLinearTransform for sharpening, CurvesTransformation, DynamicCrop.
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Notes:
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