NGC 3646 (Gary Imm)

Celestial hemisphere: Northern · Constellation: Leo (Leo) · Contains: NGC 3646 · NGC 3649 · PGC 1610784 · PGC 1611089 · PGC 1611553 · PGC 1616301 · PGC 1616499 · PGC 1617109 · PGC 1618138 · PGC 1618430 · PGC 1621875 · PGC 1622425 · PGC 1622440 · PGC 1624600 · PGC 1625621

NGC 3646

This spiral galaxy is located 130 million light years away in the constellation of Leo at a declination of +20 degrees. It is a magnitude 11 galaxy which spans 4 arc-minutes in our apparent view. This corresponds to a large actual diameter of 150,0000 light years.

From our view perspective, the disk is inclined about 20 degrees from edge-on.

This galaxy disk structure is incredible for such a distant object. The yellow inner region shows a barred core and the beginning of nice spiral arms. But in the outer region, the arms plume out and become chaotic, dotted with blue star clouds and short arm fragments. But despite its interesting structure, this galaxy is not a popular target, having been imaged just 3 times on Astrobin.

The small galaxy to the upper left is the beautiful yellow spiral ring galaxy NGC 3649. It is about the same distance away as NGC 3646. This companion could be the cause of the disturbed disk of NGC 3646, although NGC 3649 is only slightly disturbed.

In the upper left of the image is a distant galaxy cluster, at least 2 billion light years away.

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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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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.
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Status	Advanced success
Started	...
Astrometry.net job	9841357
PixInsight job	J6GPZXPGIGQ7ZN3Q45LPIZAJN0JZALH9
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	11h21m42s.834
RA (top/left)	11h23m10s.386
RA (top/right)	11h20m15s.403
RA (bottom/right)	11h20m15s.553
RA (bottom/left)	11h23m09s.994

Dec (center)	+20°10′03″.30
Dec (top/left)	+20°23′55″.82
Dec (top/right)	+20°23′58″.21
Dec (bottom/right)	+19°56′07″.73
Dec (bottom/left)	+19°56′05″.55

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NGC 3646

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