The Starfinder Society scenario #1-16 introduces the city-state of Vanos on Verces (this is not a spoiler). Presumably an upscale Outlaw Kingdom, we know it's located in the temperate zone and locked in a state of permanent twilight.
However, it doesn't appear on the map in Pact Worlds, so beyond those hints there's no telling where Vanos is located in relation to its neighbors. Personally I've tucked it in the elbow of that mountain range northeast of Athalo, between the mountains and the large lake, more-or-less right at the mouth of that river tributary. Anyone else plunk Vanos on a map? Anything official I've missed?