Sh2-170 (Rüdiger Patommel)

Sh2-170

SH2-170, also known as the Small Rosette Nebula, is an H2 region in the constellation of Cassiopeia. This region of gas and dust lies about 7,500 light-years away in the Perseus Arm of our Milky Way.
The bright star at the center of the nebula ionizes the surrounding hydrogen gas, causing it to glow. The nebula has the shape of a ring similar to the Rosette Nebula and is 2/3 the size of the full moon. Although not small, it is a very faint and relatively unknown object.
While most of its light comes from ionized hydrogen, it also contains oxygen and sulfur gases, which are also ionized and glow. This fact makes it a good target for narrowband imaging, and the separate Ha, OIII, and SII images that I plan to do show the distribution of these molecules in the region.
There is also a significant amount of dark dust mixed in with the gas, and dark knots and threads can be seen everywhere.

SH2-170, auch bekannt als „Kleiner Rosettennebel“, ist eine H2-Region im Sternbild Kassiopeia. Diese Gas- und Staubregion liegt etwa 7500 Lichtjahre entfernt im Perseus-Arm unserer Milchstraße.
Der helle Stern im Zentrum des Nebels ionisiert das umgebende Wasserstoffgas und bringt es zum Leuchten. Der Nebel hat die Form eines Rings ähnlich dem Rosettennebel und ist 2/3 so groß wie der Vollmond. Obwohl es nicht klein ist, ist es ein sehr schwaches und relativ unbekanntes Objekt.
Während der größte Teil seines Lichts aus ionisiertem Wasserstoff stammt, enthält es auch Sauerstoff- und Schwefelgase, die ebenfalls ionisiert sind und leuchten. Diese Tatsache macht es zu einem guten Ziel für die Schmalbandbildgebung, und die separaten Ha-, OIII- und SII-Bilder, welche ich noch anfertigen möchte, zeigen die Verteilung dieser Moleküle in der Region.
Außerdem ist dem Gas eine beträchtliche Menge dunkler Staub beigemischt, und überall sind dunkle Knoten und Fäden zu sehen.

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