The "'Uppsala DLR Trojan Survey "'( "'UDTS "', also known as " "'UAO DLR Trojan Survey " "') is an astronomical survey to study the movements and locations of asteroids near Jupiter, which includes Jupiter trojans and other asteroids, which line-of sight are frequently blocked by the giant planet.
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A delay between outburst and discovery was a common situation in astronomical survey work ( and I am an over-the-hill professional astronomer, so this context is obvious to me but not to most other people ), something that has to some extent faded away with the advent of robotic surveys with active, real-time alert capacity ( which I think started in the 1990s with the MACHO and OGLE gravitational microlensing search programs ).
