Thursday 22 December 2011

The Perseus Cloud

A dim patch of light emerges from the dark cloud in southern Perseus. This is NGC 1333. I thought I'd have a second try at this object with my modified camera on the 20". I had a good dark night when the object was quite high and plenty of light gathering power. It was a bit of a struggle getting good auto-guiding, as it is a dark cloud and there are not many bright stars nearby to guide on. I did a bit of masking and selectively blurring the dim nebulosity, in order to try to smooth out the background, but started to get into 8-bit processing artefacts. In the final image (33 x 30second & darks, flats, etc.), reddened stars abound in the dark cloud, and the blue reflection nebulosity fades into the darkness around the edges. A few dark lanes cross the nebula and a few spots of activity show up dotted off to one edge. The large dark cloud crosses the centre of the image and background stars appear to peek out to the right edge. The width of this picture is similar to that of the moon.

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