The ancient derelict drifted aimlessly across the solar system as it had done for untold ages, completing loop after loop around the star known to the system's indigenous population as Sol.
So tiny and so remote was the ancient object that no humanoid eye, no matter how sharp or capable, could have spotted her. Even the proposed Hubble Space Telescope, had it ever been launched, would never have found it. But then, that was a very long time ago, and nobody alive today would have even known to go looking for it in the first place.
And so it continued, its orbit occasionally perturbed by gravity from one of the gas giants in the system, or pelted by a micrometeoroid, seemingly eternally doomed to watch over the system from which it had once — and now long forgotten about — originated.