Arp 41 / NGC 1232 (Gary Imm)

Arp 41 / NGC 1232

This object is a spiral galaxy located 70 million light-years away in the constellation of Eridanus at a declination of -21 degrees. The almost face-on galaxy is 7 arc-minutes in diameter in our apparent view, which corresponds to 150,000 light years in diameter.

Despite being relatively close, this is one of those objects that seems to hide its details from us. Even images with much longer integration times appear to me to be poorly detailed.

Despite the lack of details, I find this to be an amazing galaxy. Three arms spiral out of the slightly barred core. The arms are sprinkled throughout with blue star clusters and are separated by long dark lanes of dust. The arms start out with beautiful curvature near the core, but after extending from the core a short distance they become Vorontsov-Velyaminov rows (straight segments).

This galaxy is known as Arp 41 because of its companion spiral galaxy (PGC 11834), located slightly to the left. This companion galaxy appears to distort the nearby arm of the main galaxy. But in reality these galaxies are not interacting since the smaller galaxy (at 75,000 light years diameter) is 4 times further away.

If the smaller galaxy is not causing the visible disturbance we see in the arm structures, than what is? Some believe that a dwarf galaxy is responsible, a galaxy which has since been absorbed into NGC 1232.

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Arp Catalog (Complete)
Brightest Galaxy Catalog (Complete)
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Hexagon Galaxy Shape
Hidden Treasures Catalog (Complete*)
Many Galaxy Arms
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Status	Advanced success
Started	...
Astrometry.net job	3885708
PixInsight job	IIZJDNUDPA4XGPXVCRRH5QCE3WNH43AC
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	03h09m45s.583
RA (top/left)	03h10m27s.926
RA (top/right)	03h09m05s.289
RA (bottom/right)	03h09m03s.250
RA (bottom/left)	03h10m25s.971

Dec (center)	-20°34′42″.80
Dec (top/left)	-20°27′26″.58
Dec (top/right)	-20°26′51″.11
Dec (bottom/right)	-20°41′58″.13
Dec (bottom/left)	-20°42′33″.52

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Arp 41 / NGC 1232

Arp 41 / NGC 1232

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Arp 41 / NGC 1232

Arp 41 / NGC 1232

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