Surprised this nice object does not have a common name. My wife says it looks like another rose-like nebula....
Started with the Narrowband Assistant PI script from
@Alex Woronow .
Stretched with GHS:
GHS Forum DiscussionPrevious versions from a long long time ago with Rob's Astro-Tech and with my Tak 180Ed when I was discovering narrow band filters.
Sh2 170 Narrow Band 
Sh2 170 H-Alpha RGB Discussion of GHS aspects of processing:
GHS Forum DiscussionFrom GalaxyMap:Sh 2-170 lies in the direction of the
Cas OB5 supershell.
There is some confusion about the designation of the ionising star.
A 1995 paper concludes that the sole exciting star of Sh 2-170 is
DM +63 2093, an O8 V star of 31 solar masses. Avedisova agrees on the star but gives a slightly cooler O9 V class. Curiously, SIMBAD gives a G5 spectral class for this star.
Reed gives the name for the star in this location as
LS I +64 11, which SIMBAD lists as the O9.5 multiple star BD +63 2093p. A 2004 paper agrees on the BD +63 2093p designation and agrees with Avedisova on the O9 V class. This paper also says that BD +63 2093p is a member of the small open cluster
Stock 18 and estimates 910 +/- 90 solar masses for the hydrogen gas in the nebula.
GENERAL NOTE ON SHARPLESS2 OBJECTS>>>>>>>>>>>>>There are 313 Sh2 objects. All now imaged.
This is my collection:
Sharpless2Wide-Angle Hydrogen Alpha Nikon Image Sh2 79-171Please note there is also a Sharpless2 Group with now more than 2700 examples.
Sharpless2 GroupOther useful links include:
Gary Imm's CollectionGalaxyMap's CollectionThe Sharpless CatalogThe MDW H-alpha Sky SurveyReiner Vogel's detailed observing catalogHope you enjoy these obscure but interesting objects...
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