NGC 253 Sculptor Galaxy (chrislinyy)

Celestial hemisphere: Southern · Constellation: Sculptor (Scl) · Contains: NGC 253 · Sculptor Filament · Silver Coin

Image of the day 11/19/2020

NGC 253 Sculptor Galaxy

Link to TIFF/FITS: https://drive.google.com/drive/folders/1pnk0v76Q0O17OchCCa7t6o_-oAb_KcVs?usp=sharing

Acquisition type: Electronically-Assisted Astronomy (EAA, e.g. based on a live video feed)

Image of the day 11/19/2020

NGC 253 Sculptor Galaxy

Link to TIFF/FITS: https://drive.google.com/drive/folders/1pnk0v76Q0O17OchCCa7t6o_-oAb_KcVs?usp=sharing

Acquisition type: Electronically-Assisted Astronomy (EAA, e.g. based on a live video feed)

Sub-frames acquired by SkyGems Remote Observatory. Unprocessed integrated FITS are available for download.

This is a LHaRGB rendition of the starburst galaxy, NGC 253, in the constellation Sculptor. It is pretty dim and only can be viewed with a telescope (actually all objects in the imaging field are too faint to be viewed by naked eye).

H-alpha data is first black clipped to remove background noise and retain only active regions, then scaled up 4 times and added to the R channel (this way R and Ha are blended with approximately 2:1 ratio). HaRGB channels are all hardware binned to 2x2, then upsampled to align with luminance channel. Heavy denoising and convolution are applied to HaRGB image to smooth out color grains before merging with luminance.

Color calibration done with AutoColor script in PixInsight, denoised with EZ Denoise script and then stretched. Saturation curves, HDRMultiscaleTransform, LocalHistogramEqualization and UnsharpenMask are applied to bring out more color and sharpness.

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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Status	Basic success
Started	...
Astrometry.net job	3997198
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Image of the day 11/19/2020

NGC 253 Sculptor Galaxy

Image of the day 11/19/2020

NGC 253 Sculptor Galaxy

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Image Index:

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Image of the day 11/19/2020

NGC 253 Sculptor Galaxy

Image of the day 11/19/2020

NGC 253 Sculptor Galaxy

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B

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