I found these anti-asteroid suggestions on the net, can forum members think of any more?
1- KINETIC IMPACTOR: a spacecraft that would deliberately crash into an asteroid at high velocity in an effort to alter its trajectory.
2- GRAVITY TRACTOR: a spacecraft that will fly alongside the asteroid for a period and exert a gravitational effect on it.
3- LASER KETTLE: a spacecraft flies alongside an asteroid and uses lasers to heat its surface generating a plume of gas and debris that gives the asteroid a subtle push.
4- ATTACHING ROCKET: attaching a low impulse rocket to the asteroid to deflect it..
5- SHREDDER: placing an automated “mass ejector” system on the surface of the asteroid that would extract mass from the rock and eject it into space, again giving the object a steady push.
6- NUKE BOMB SHOCK WAVE: a nuclear charge is detonated at a certain distance from the object causing a flow of radiation that will vaporise the asteroid’s surface and push it into a different orbit.
7- NUKE BOMB IMPLANT: as used by Bruce Willis in the film Armageddon by burying a giant bomb beneath the surface and blasting the asteroid to smithereens.
https://www.theengineer.co.uk/protecting-planet-large-meteor-strikes/