Messier 16 (M16)
Common Name: Eagle Nebula
Also Known as: NGC 6611, IC 4703, Eagle Nebula, Star Queen Nebula, The Spire, Sharpless 49
Object Type: Emission Nebula and Open Cluster
Constellation: Serpens
Distance from Earth: 7,000 light years
Apparent Magnitude: 6.0
Coordinates: RA 18H 18M 48S DEC -13 deg 49 min 0 sec
Actual Size: 70 x 55 light years (nebula), 15 light years (cluster)
Apparent Dimensions: 30 arc minutes (nebula).
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Environmental Data
Date: June 20, 2022 Start Time: 9:49PM End Time: 2:53 AM SQM: 17.72
Moon Age: 21.1 days Moonrise: 0:46 AM Moon Illumination: 57.9%
Temperature: 65 degrees F Humidity: 70% Dew Point: 55 degrees F
Location: Westport, Massachusetts 02790 Sky Condition: High clouds
Comment: Good PHD2 calibration. Clouds on/off all night
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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 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 Good HFR 2.06 Platesolve: Good on 2nd 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: 2-3 sec Binning: 1x1 Tracking Result: 0.9 arc-seconds RMS
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Images Taken
Number of light frames: 124 Duration: 2 minutes Gain: 100
Camera Temperature: -10 degrees C Binning: 1x1 F-Stop: 7.0
Total Integration Time: 4.13 hours
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Number of flat frames: 61 Duration: 0.08 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: GraXpert, AutoColor Script, BlurXTerminator, NoiseXterminator.
Non-Linear:
GeneralizedHyperbolicStretch script, StarXterminator to produce both stars-only & starless images
Stars-only image --
Starless-image --MultiscaleLinearTransform - to sharpen, CurvesTransformation
HistogramTransformation.
ImageBlend to combine Stars-only and Starless images, CurvesTransformation to increase saturation, DybanicCrop, BlurXterminator
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Notes:
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