Celestial hemisphere:  Southern  ·  Constellation: Ophiuchus (Oph)  ·  Contains:  Solar system body or event
Comet C/2017 K2 Panstarrs, Caleb Melton
Comet C/2017 K2 Panstarrs
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Comet C/2017 K2 Panstarrs

Comet C/2017 K2 Panstarrs, Caleb Melton
Comet C/2017 K2 Panstarrs
Powered byPixInsight

Comet C/2017 K2 Panstarrs

Equipment

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Acquisition details

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Description

Pixinsight Process:
Image Integration: Integrate flats and dark frames.
Image Calibration: Calibrate the flats and darks into the light frames.
NormalizeScaleGradient: Helps with star rejection when integrating comet images.
Star Alignment: Align light frames in LRGB to a single frame.
CometAlignment: Select blinked frames, check first and last image.
ImageIntegration: Integrate comet images, Image Integration: (Combination: Average, Normalization: None), Pixel Rejection (1): (Rejection Algorithm: Winsorized Sigma Clipping, Normalization: Scale + Zero Offset), Pixel rejection (2): (Sigma Low: 2.5 (Counteracts dark regions left by stars)), (Sigma High: 0.75 (Lower rejects more stars))
Comet Alignemt: Take integrated comet images and make sure they are aligned on eachother.
ImageIntegration: Integrate star images, Same settings as comet images, just lower sigma high.
DynamicBackgroundExtractor: Extract background from star images.
EZ Soft Stretch: Run basic settings on EZ Soft Stretch
LRGB Combination: Combine RGB Comet images, check Chrominance NR.
LRGB Combination: Combine RGB Star images, check Chrominance NR.
Starnet2: Extract stars from the image with stars
NoiseXTerminator: Use NoiseXTerminator to reduce noise of the image
CloneStamp: Some bright stars leave bright trails, so clone stamp them away
Range Selection: Mask the comet off from the background in the combined comet image
Convolution: Convolve background in order to greatly reduce the star trailing left behind
NoiseGenerator: With image still masked off, Amplitude: 0.03, Normal (aka Gaussian), adds back noise because background would otherwise be too smooth
SCNR: With background still masked off, run SCNR at 0.35 to take away the chrominance noise NoiseGenerator added in, leaving behind a small grain.
Curves Transformation: Normal S curve to boost contrast.
Color Saturation: Apply color curves to desired saturation.
PixelMath: Add stars into comet image, ($T+1.3*Stars) Change 1.3 depending on the difference in stretches.

Comments

Sky plot

Sky plot

Histogram

Comet C/2017 K2 Panstarrs, Caleb Melton

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Solar System