Another group of Sharpless2 objects. I swear I see a small scorpion hanging on this one.
Stretching optimized with GHS:
GHS Forum DiscussionA lot of detail in the long exposure in Prior Versions... there are dozens our hours of imaging here.
What is interesting to me now comparing the CMOS images is just how much additional Ha there is around these objects missed by the CCDs. I think this is probably a function of the camera plus the use of GHS.
Sh2 169 and Sh2 168 H-alpha RGB 
Sh2 168 HA RGB Medium Small Sharpless Object From GalaxyMap:168: Avedisova concludes that the HII region Sh 2-168 is ionised by the O9 V star
LS I +60 50. SIMBAD gives a slightly cooler B0 V spectral class. This is in the direction of an expanding shell surrounding
Cas OB5.
Avedisova places Sh 2-168 in the star formation region
SFR 115.80-1.60 along with the radio source
KR 84. The nebula includes the loose infrared cluster [url=
http://simbad.u-strasbg.fr/simbad/sim-id?Ident=[BDS2003]+47][BDS2003] 47[/url] and the Herbig-Haro object [url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=%40127998&Name=GM 2-44]GM 2-44[/url].
169: A faint nebulosity near the direction of the much brighter
Sh 2-168. Avedisova finds that it is ionised by the B0 III giant
BD +59 2786.
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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