M43 (Nov. 2017)

Here is M43, the nebulosity surround in NU Orionis, the brightest star in this image.  NU Orionis is a B-type star and radiates UV radiation that probably makes M43 glow.

This image is just 16x240" through the CFF 290 Classical Cassegrain at eff. f/8.1 on a night of about average seeing, which means that 2453mm is too long for the seeing conditions.  It was shrunk 14% to accommodate the poor seeing conditions.  Still, it is an interesting image.  M43 is always overlooked for its near neighbor M42.

M76 (Fall 2017)

I gathered data for this image over four nights in September and October.  M76 is found in our constellation Perseus.  Looking back, I should have taken much longer OIII subs.  I started out with 8-minute subs for narrowband, but the extended lobes of the nebula remain mostly invisible without longer exposures.  For the last Ha, I switched to 20-minute subs.

This is 31x480 in OIII, 9x480 in Ha, and 14x1200 in Ha.  Camera was the SXVF-H9.   Telescope was the CFF 290 Classical Cassegrain at eff. f/8.1.