What is the problem with blowing up large asteroids?

Initially if you could make sure that after you blow up an asteroid you will end ... The problem here lies in the fact that we know little about the internal A grain of dust is enough to deflect a billiard ball by a large span, given ...To blow up an asteroid with a nuclear bomb would be a major undertaking. ... An asteroid like her would spell big trouble for our planet if she ever got the notion ..Luckily for us, asteroids the size of Bennu, and giant asteroids like the one ... They enter our atmosphere as meteors, where many blow up in mid-air; ... and tracks new objects and will issue warnings about possible impacts.

not completely sure but i think it’s many moons, smaller in size and a ring system.