Sh2-180, Sh2-173, Ou2, NGC225 (Rolf Dietrich)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: NGC 225 · The star 12Cas · The star κCas

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Sh2-180, Sh2-173, Ou2, NGC225

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Sh2-180, Sh2-173, Ou2, NGC225

Here is my attempt at the Ha emission nebula Sh2-180 to be shown together with Sh2-173.
I was inspired on Sh2-180 by the wonderful renditions of Equinoxx and Gary Imm.
This is where I first became aware of this rarely imaged object.

Sh2-180 has a much lower luminosity than Sh2-173.
In order to better distinguish Sh2-180 from the overall red background, I invested another 10x600s exposure time with my f/4 Newton.
SII (orange mapped) was only visible on the right outer edge of Sh2-173 and just below left of Sh2-173.
An OIII emission appeared only in the planetary nebula Ou2 (Outters II).
Ou2 was first discovered by French astronomer Nicolas Outters in November 2010.

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Description: Sh2-180 crop

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Southern Hemisphere Astro

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Astrometry.net job	5426483
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Sh2-180, Sh2-173, Ou2, NGC225

Sh2-180, Sh2-173, Ou2, NGC225

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Image Index:

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Sh2-180, Sh2-173, Ou2, NGC225

Sh2-180, Sh2-173, Ou2, NGC225

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