It works best if you have already visited the Attlerock yourself. Wake up, board your ship, and put on your space suit. Go to the computer and mark a location on the Attlerock. I used the Eye Signal Locator because it is the first location to choose from and also because it is on the north pole, which means its distance from the model ship platform varies less as the moon rotates and revolves around you.
Go to the platform and wait. When the Eye Signal Locator is about 700 meters away, launch the model ship up
and forward
, so that it remains in the center of your screen. Just go in a straight line up and forward, and the moon will come at the right time. Be sure not to overshoot it; if anything, you want to come in from the bottom. Don't worry about a safe landing; just plow into the moon. You will hear it crash, and the achievement will unlock.
Here's a demo. It's dark at the beginning, but I'm standing at the model ship platform, turned around and looking at the canyon wall.