Hmmm. I have no idea what any of that means as far as the niche goes. To decide if it's a good niche for YOU, think about this: Could you enjoy researching and writing about this every week?

Are there enough related topics that you feel like you wouldn't run out of stuff to say after a few months?

Your personal interest and the longevity of topics to write about have always been important to my own niche selection.

That's an interesting niche topic. haven't seen that one before. Not sure I know enough about the subject to know if it's defined enough. I'd say start out focusing on one facet of this niche to start with, but leave yourself the scope to broaden your topic down the track. Meaning, don't name your website something too specific that won't allow you to encompass more information down the track.