NGC2237, the Rosette Nebula in Monoceros.
This image uses a stack of 8 eight minute exposures shot through a Hydrogen-alpha filter for the luminance channel
and stacks of 5 eight minute filtered exposures for the red, green and blue channels.
The exposures were acquired using an SXV-H9 CCD camera on a Tele Vue TV-60 60mm f/6 refractor equipped with a 0.8x focal reducer.
The exposures were calibrated, defect-corrected, stacked and automatically color balanced using AIP4WIN.
This image has been resampled down from its original size of 1392x1040.
This is the first-light image from the Tele Vue TV-60is,
and is also the image we used for the cover of the
2nd edition of The Handbook of Astronomical Image Processing.