Sextans A (Jan Scheers)

Celestial hemisphere: Southern · Constellation: Sextans (Sex)

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Sextans A

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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 the Planewave CDK24 telescope and FLI PL09000 CCD-camera from Telescope Live in El Sauce Observatory, Chile.

Total integration time: 260 minutes
LRGB 6:7:6:7 subs of 600s

Processing with AstroPixelProcessor and Photoshop CC with AstroPanel Pro, Astronomy Tools, Topaz Sharpen AI & Franzis Denoise Projects 3 plug-ins.

Southern Hemisphere Astro
Telescope.live

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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.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Advanced success
Started	...
Astrometry.net job	5528390
PixInsight job	J5AN6QIZO5MVF2RPNNGURYUL6B6KMS72
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	10h10m58s.985
RA (top/left)	10h11m44s.421
RA (top/right)	10h10m12s.560
RA (bottom/right)	10h10m13s.404
RA (bottom/left)	10h11m45s.854

Dec (center)	-04°42′02″.29
Dec (top/left)	-04°30′46″.18
Dec (top/right)	-04°31′08″.10
Dec (bottom/right)	-04°53′18″.20
Dec (bottom/left)	-04°52′55″.73

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Sextans A

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