A very small probe that emits an impossible to miss signal at random pretty long intervals and then adjusts its orbit to be very different. It would basically pretend to be various Aliens civilizations trying to contact us. Like every 45 days a new signal from a new part of the sky is picked up and then never repeats and if were just getting tons of messages at once. And since the probe is small and doesnt have a predictable orbit it would be very hard to figure out that its actually a probe and then find it.
A very small probe that emits an impossible to miss signal at random pretty long intervals and then adjusts its orbit to be very different. It would basically pretend to be various Aliens civilizations trying to contact us. Like every 45 days a new signal from a new part of the sky is picked up and then never repeats and if were just getting tons of messages at once. And since the probe is small and doesnt have a predictable orbit it would be very hard to figure out that its actually a probe and then find it.
Alternatively. A plane full of snakes.