A mission with too few places to go

I've noted here before that I like the idea of a manned mission to an asteroid. The problem according to the article linked below is that in the next 10-15 years, there aren't a lot of hard targets in convenient enough orbits to allow such a mission, and one of them is only available in a timeframe that would be somewhat of a rush.

Well, nobody said it was going to be EASY.

Few asteroids look ripe for asteroid mission by 2025