Could be a derelict, though. Arguably, spaceship wrecks should be more numerous than spaceships themselves. After all, assuming alien spaceships have existed

Could be a derelict, though. Arguably, spaceship wrecks should be more numerous than spaceships themselves. After all, assuming alien spaceships have existed for a long time and have a relatively short operational time, they exist for much longer as a wreckage and are as such much more likely to be found in this form. Just consider our own near-Earth space : there are many more space debris there than there are operational satellites.