NASA planned to circumnavigate Titan with a balloon, see Titan Saturn System Mission. This makes Titan a prime solar system body candidate for this market.

@severa For avoidance of doubt, can you clarify that above NASA Titan mission would resolve this market YES?

@SanghyeonSeo Assuming it circumnavigated Titan, that would certainly resolve to Yes.

What's the minimum size for an asteroid to be circumnavigable for the purpose of this market? Like if someone flies out to a rock the size of a basketball that's orbiting the Sun on its own and touches it with their boot on four sides, does that count?

@sesquipedalianThaumaturge A basketball-sized object would be too small. I'm not going to give an exact minimum size, because there might be clever ways of circumnavigating very small objects. Like, crawling around an asteroid the size of a large boulder would count, if you managed to keep from flying off.

@severa Would a very small rover or other robot which crawls around an asteroid smaller than a human be such a clever way?

@sesquipedalianThaumaturge That would be a clever enough technical feat that I'd allow it, yes.