© WhoForted?
First publicized in Disneyland Of The Gods, John Keel wrote of an object observed in polar orbit. Its size was beyond the known means of any terrestrial space program and once in the public consciousness more observations were recorded. Some ham radio operators, precursors to today's basement-dwelling neckbeards, claimed eavesdropping on strange signals from the satellite dubbed "The Black Knight". From the ground it was a glowing, red object moving in an east-to-west orbit contrary to contemporary satellites. Life gets more interesting as humans take their first steps into space.
First known observation of TBK from orbit was by Gordon Cooper bringing forth explanations that Gordo was tripping balls from a build-up of carbon dioxide, but the sightings didn't stop there. One of the more famous photos floating around the internet is from STS-088 (1 2 3 4 5 6), spied from Endeavor back in 1987 long before Photoshop was a twinkle in a pervert's eye.
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an orbiting dump trailer - well, the back half, anyway. There are two wheels visible at the top right of this object, though the resolution isn't fine enough to make out whether there are still tires on there. The truck cab is missing.
Since it's been up there for a while, one can only surmise that somebody driving a big dirt hauler must have really pissed off some rather powerful alien ultraterrestrial who was having a very bad day and ended up in orbit.