NGC 4889
Also Known as: Caldwell 35, NGC 4884
Object Type: Giant Elliptical Galaxy
Constellation: Coma Berenices
Distance from Earth: 308 million Light years
Apparent Magnitude: 12.9
Coordinates: RA 13H 00M 8.1S DEC 27deg 48min 37sec
Actual Size: 239,000 light years in diameter
Apparent Dimensions: 2.9 arc-minutes
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Environmental Data
Date: April 2, 2022 Start Time: 8:51PM End Time: 12:53AM SQM: 18.06
Moon Age: 1.4 days Moonset: 8:49PM Moon Illumination: 2.4%
Temperature: 45 degrees F Humidity: 59% Dew Point: 31 degrees F
Location: Westport, Massachusetts 02790 Sky Condition: Clear, getting cloudy later
Comment:
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Imaging Scope Data
Mount: iOptron CEM120 Camera: ZWO ASI2600 OSC Focuser: Optec DirectSync SVX30
Telescope: Stellarvue SV90 refractor Focal Length: 630mm
Focal Reducer/Field Flattener: Field Flattener 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 Utnity Platform
Imaging Status
Imaging Software: Sequence generated Focus HFR 2.14 Platesolve: Success on 3rd attempt
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Guide Scope Data
Telescope: Stellarvue SVX130 refractor Camera: ZWO ASI290 Focuser: Optec DirectSync SV35
Dew Heater: Kendrick dew strip Software: PHD2 Exposure: 2.5 sec Binning: 1x1 Tracking Result: 0.5 arc-seconds RMS
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Images Taken
Number of light frames: 110 Duration: 2 minutes Gain: 100
Camera Temperature: -10 degrees C Binning: 1x1 F-Stop: 7.0
Total Integration Time: 3.67 hours
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Number of flat frames: 40 Duration: 0.06 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: 15 Duration: 2 minutes Gain: 100
Camera Temperature: -10 degrees C Binning: 1x1 F-Stop: 7.0
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Number of Bias frames: 15 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, DynamicCrop, CurvesTransformation
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Notes:
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