Well, what can I say? Each view has a converse view which is of equal, greater or lesser weight.
A view that a satellite does not blink inside the shadow of the Earth is untrue because all satellites sit within the Earths' shadow at night.
An assumption that the object is scaled so large that it would have been detected before is possibly an answer. Perhaps it has been detected before, though I think not. One would need to view records.
It may be the case that the second foci of the elipse which forms the orbit of the asteroid(?) is so distant from the sun that the oribit is extremely large. It may be the case that it is an orbit in excess of the orbit we associate with the big comets for example. The orbit of Halleys' comet for example, might be only a shard of the size of the orbit of this object. It may have an orbital cycle which is many hundreds of years old.
It may be the first time in living memory that a person has captured it on film. It was only after repeated passings of Halley's comet that Edmond Halley became synonomous with the comet. Archival workers had to attribute the discovery of the orbital cycle to Mister Halley before the comet could receive its' name.
So there are many questions to be answered before I attribute the object to a falling poo-poo or flotsam from the sky lab or some such other terrestrial object.
It may bash and bang a rocks on its' way out into the outer solar system and fail to return or may return.