Celestial hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  Sh2-175
Sh2 175 H-alpha RGB, Jerry Yesavage
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Sh2 175 H-alpha RGB

Sh2 175 H-alpha RGB, Jerry Yesavage
Powered byPixInsight

Sh2 175 H-alpha RGB

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Description

One more of the smaller (2"x2") Sharpless2 objects.

Information from:

http://galaxymap.org/cat/list/sharpless/171

Sh 2-175 appears in the direction of a supershell of molecular and atomic hydrogen clouds surrounding the Cas OB5 association, which is part of the Perseus arm. A widely varying range of distances to this nebula and its potential ionising star has been published in the scientific literature.

Avedisova gives the ionising star of Sh 2-175 as LS I +64 26 (O9.5 V), which Humphreys lists as a field star outside of any OB association.

Russeil concludes that LS I +64 26 is actually a B1.5 V star at 1090 +/- 210 parsecs and locates Sh 2-175 at this much closer distance.

You can read more about this region (with full references) in this galactic plane commentary (see the above web site).

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