(Planet employee here) Planet imaging happens in the late morning, because that's when we tend to get clearer atmosphere, relatively short shadows, but minimal specular-like reflection of sunlight. This event happened in early evening (I think the aircraft was first spotted on radar around 4.30 PM) so we won't have any imagery of it. We'd have more luck if we could guess at a location it would be in the morning, and we had reason to believe it was parked out in the open.

Any guesses? Does anyone want to dig into something like flightradar24 records and see if something took off with a transponder then disappeared that day?