Or maybe strap rockets to the asteroid and safely drop it in a shallow part of the Ocean, where you can retrieve it at convenience. First you have to break it

Or maybe strap rockets to the asteroid and safely drop it in a shallow part of the Ocean, where you can retrieve it at convenience. First you have to break it into smaller pieces, a regulated implosion or something. Then strapping rockets to it, so you can control its motion in three axes (three rockets, maybe) and remotely guide it to earth. 3/4 ocean is hard to miss.