Sextans A
Sextans A
Sextans A is a tiny dwarf irregular galaxy. It spans about 5000 light-years across, and is located at 4.3 million light-years away, in the outskirts of the Local Group of galaxies, which includes the Milky Way galaxy, and to which Sextans A may or may not belong.
Sextans A has a peculiar square shape. Massive short-lived stars exploded in supernovae that caused more star formation, triggering yet more supernovae, ultimately resulting in an expanding shell. Young blue stars now highlight areas and shell edges high in current star formation, which from the perspective of observers on Earth appears roughly square.
Image was acquired with CHI-1, data from 3 one-click observations
Total integration time: 260 minutes
LRGB 6:7:6:7 subs of 600s
Sextans A has a peculiar square shape. Massive short-lived stars exploded in supernovae that caused more star formation, triggering yet more supernovae, ultimately resulting in an expanding shell. Young blue stars now highlight areas and shell edges high in current star formation, which from the perspective of observers on Earth appears roughly square.
Image was acquired with CHI-1, data from 3 one-click observations
Total integration time: 260 minutes
LRGB 6:7:6:7 subs of 600s
SPECIFICATIONS
Telescope
CHI-1 Planewave CDK24
Camera
FLI PL9000
Location
El Sauce Observatory, Chile
Date of observation
6/02, 8/02 and 24/02/2022
Filters
LRGB
Processing
AstroPixelProcessor and Photoshop CC with AstroPanel Pro, Astronomy Tools, Topaz Sharpen AI & Franzis Denoise Projects 3 plug-ins
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