NGC 6636 (Gary Imm)

Celestial hemisphere: Northern · Constellation: Draco (Dra) · Contains: NGC 6636 · PGC 2688569 · PGC 2688704 · PGC 61780 · PGC 61782

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NGC 6636

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NGC 6636

This object is a pair of interacting galaxies located 200 million light years away in the constellation of Draco at a declination of +67 degrees. The pair span 2 arc-minutes in our apparent view, which corresponds to an actual diameter of 120,000 light years.

Incredibly, little has been written about this interesting object. The large edge-on galaxy core is yellow and its arms have a bluish cast. Many star clusters are visible in the galaxy disk – in fact, I am surprised at the amount of detail seen for an object 200 million light years away. The galaxy disk is deformed, more at the bottom than at the top, likely due to the gravitational interaction with its companion.

The structure of the small companion is a mystery to me. The inner region is so compact and bright that it looks like a star, while the outer region is diffuse. I am surprised that this small companion is not more deformed from the interaction.

There is a tiny smudge visible above the small companion. This tiny object could be a remnant of this interaction, but my guess is that it is a distant background galaxy.

Unique or Unusal Deep Sky Targets
Cloudy Nights
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ZWO ASI1600MM/QHY163M
Texas Astronomy
Images from the EdgeHD Series
Schmidt-Cassegrain Telescope (SCT) Imagers

Astrobin Debuts (670 DSOs)
Edge-on Galaxies
Warped Disk Galaxy Shape

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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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Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
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Status	Advanced success
Started	...
Astrometry.net job	3552441
PixInsight job	NY1NWIZIUYQMLH162M9L6TORLJ5ZXRCX
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	18h22m02s.689
RA (top/left)	18h23m28s.350
RA (top/right)	18h20m36s.415
RA (bottom/right)	18h20m37s.722
RA (bottom/left)	18h23m28s.279

Dec (center)	+66°36′58″.75
Dec (top/left)	+66°42′50″.82
Dec (top/right)	+66°42′45″.45
Dec (bottom/right)	+66°31′03″.72
Dec (bottom/left)	+66°31′08″.84

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