January 17, 2018

NGC 2174 and HD 42088 (Jan. 2018)



NGC 2174 is a bright emission nebula surrounding HD42088, a mag 7.55, O-type star in northern Orion.  Most large emission nebulae have an O-type star near their centers.  The orange star at lower left is HD252208, a type K star.  The brighter star at the top is also a type K.

This is a full spectrum image tempered by the Astronomik CLS light pollution filter.  The camera was the SXVF-H9C.  The image is a stack of 18x9' frames.

The telescope for this image is new, an 8" Newtonian reflector with parts gathered from various suppliers.  I am not finished tweaking the telescope yet, but I like this image.  I also like the speed of this scope.  Whereas my classical Cassegrain images (with reducer) at f/8.1, this scope images (with coma corrector) at f/4.9.

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