How to move an object using the arrow keys

I am trying to move an object in the direction it is pointing, which happens to be an asteroid, around the screen using the arrow keys. I am using translation and rotaion to do this. ( I believe there is some math involved here, the direction times the speed, then translate to that value.)

if (keys[VK_UP]) Move Forward …
if (keys[VK_DOWN]) Move backward …