Hi

How can I update the star markings (and perhaps keywords) from existing large Aperture library to existing Lightroom library. 

I moved all the photos in my Aperture library to Lightroom in the summer of 2014. Now I would like to get the star ratings and perhaps keywords updated FROM Aperture TO Lightroom.  I would prefer not to move the photos… It is quite large library - maybe 150K RAW Photos. 

Is this doable automatically? What tools or tricks would be available.