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Hi Max, I have looked through a scope with a parallel green laser that was bright enough to "reach to the stars", however, the size of the "spot" was quite large and an no way resembled the point of a star. The beam divergence on this laser was measured to be 0.7 milliradians (c.f. 1 milliradian on a typical laser). This equates to 1 m/km - ie. a 5 m spot size at 5000 m.
I think that the best you could do would be to centre the scope on a bright star or planet, and then adjust the laser alignment until it visually hits the same target.
Chris
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