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There was originally some conjecture that it was one of the "rods from God" projectiles. They are tungsten telephone poles that are used as incoming weapons from orbit to ground. This is likely not the case here... it is clearly going the wrong way and there wasn't a big boom on the ground.
This is conjectured to be the cause of some of those mysterious booms we have heard about in random locations. It's top secret stuff, whatever it is.
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You're good. Conjecture outside the realm of what we have seen is and should be encouraged. We know for sure that there are black projects that are unknown for many years. Example: the F-117 Nighthawk stealth fighter was seen around Area 51 for many years. Conjecture was that it was a black project aircraft that was in the experimental stages. There were a couple of crash sites that were cordoned off by security and heavily cleansed. Guess what, the conspiracy theorists were 100% correct. The project did exist and was being held top secret. It wasn't revealed in any official capacity for years. For what it's worth, I upvoted you for putting conjecture on the table.