This is a nice plant Alain. I really like the tufts of hairs on the areoles. The ribs are very prominent, I wonder if this could be a hybrid. I have been smitten with the astrophytums for a number of years now and I think asterias is my favorite, although the A. caput-medusa is really fascinating. Thanks as always for sharing.
It could well be a hybrid as there are a lot around and a lot of very nice forms. I must take some photos of some others I have.