NGC 1819 (Gary Imm)

NGC 1819

This object is a tiny, rarely imaged barred spiral galaxy located 200 million light years away in the constellation of Orion at a declination of +5 degrees. The magnitude 12.5 galaxy spans 1.3 arc-minutes in our apparent view, which corresponds to a diameter of 80,000 light years.

I imaged this galaxy because of the odd shape of the central portion that I thought I saw in the blurry SIMBAD image of this object. Little did I know how interesting it would turn out to be.

Before we get to the central region, the outer regions are fascinating in themselves. Working from the outside in, the most outer region is in the shape of a very faint S, with a bit of purplish color. Aside from this purplish hue, not much color exists in this galaxy. The next section is a near horizontal diffuse wide oval disk, reminiscent of a lenticular galaxy. Next is the very long bar, which is at an inclined angle from the disk.

This is where it gets interesting. I really don't know what is going on in the center section. The central region is oval shaped, perpendicular to the bar. There is no distinct core section. Dust lane arcs are visible but it is not clear to me how they are oriented. Most fascinating to me are the bright regions. One small stellar-like bright region is at the upper left, which could be a small satellite galaxy. Two other brighter regions are slightly above and below the exact center, connected by a similarly bright arc. Perhaps these are remnants of 2 cores from a long ago merger? I think more likely it is just one big bright core region, obscured by a wide dust lane that is swirling around the core. This could also have been the result of a merger. Numerous small galaxies are present nearby, but none appear to be companions to this galaxy.

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Status	Advanced success
Started	...
Astrometry.net job	3196834
PixInsight job	N51SZEOH4502A2KQISE5ZXHPSI9LC603
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	05h11m46s.147
RA (top/left)	05h12m21s.701
RA (top/right)	05h11m23s.508
RA (bottom/right)	05h11m10s.616
RA (bottom/left)	05h12m08s.777

Dec (center)	+05°12′00″.93
Dec (top/left)	+05°15′55″.50
Dec (top/right)	+05°19′52″.42
Dec (bottom/right)	+05°08′06″.90
Dec (bottom/left)	+05°04′09″.40

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