It felt like such a long time since I had had any opportunity to do some imaging, and I was really only hoping to get a chance to check that I could remember how to set up all my equipment and that everything was still working as it should when an unexpected clear night looked possible.

The Cave Nebula is also known as Sh2-155, or LBN529 and its Wikipedia page has some more information about it.

The colour mapping for this image is closer to a 'natural' colour than some of my previous images. I did try to capture some OIII and SII for this object but found that the signal was so weak that I could get a better final image just by using the Hydrogen-alpha data added to the red channel along with the shorter RGB exposures that I used to capture the star colours. It was a bit disappointing to see such a lack of data from the other filters, but I was really happy to finally get back out under the stars after so many months.

You can view this image in the WorldWideTelescope by clicking here.