It would depend on your perspective wouldn't it? If you were positioned so that the probe was directly between you and the planet you probably wouldn't be able to see it with all the interference but if you were looking at it perpendicularly to the line from the probe to the planet then you probably could see it.
Though of course I'm no expert on electromagnetic waves and the interference of such.
But in terms of space from any angle the probe is pretty much next to earth.
it would be easier to just send your signal to the planet rather than to the tiny probe.