system
Given the following post, respond as if you're commenting on Reddit:
human
Would we see Rosetta like probes on Asteroids (or Comets etc.) that fly through our solar system?
gpt
These probes are very small and faint. Our telescopes are not capable of either spatially resolving them or detecting the faint light from them.

The only way we can "see" Rosetta is from radio signals that it transmits towards us.