No, we don't. If you're talking about SETI, that's looking at radio signals. If you're talking about killer asteroid early-warning detection, we generally don't have the capacity to reliably detect voyager-sized asteroids even in our own solar system, let alone in interstellar space.
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No, we don't. If you're talking about SETI, that's looking at radio signals. If you're talking about killer asteroid early-warning detection, we generally don't have the capacity to reliably detect voyager-sized asteroids even in our own solar system, let alone in interstellar space.