Last months I started a new compilation of Protoplanetary Nebula (PPN)

First I only wanted to compile my past observations. But later I started a new selection of worthwhile objects. My main issue was to list objects which could be seen as laminar or detailed objects, also when big aperture is needed. I read several professional paper and measures within HST images to get the in my opinion very important information about the size and the brightness. When it is necessary I could add some objects in the future. Perhaps you know one or two other possible interesting objects?

The link you can find the compilation is as follows: http://www.deepsky-visuell.de/Projekte/PPN.htm

I hope you enjoy the list.