The capitol of the Solar System

For some time I've mooted Venus as the capital of the Solar System. The reason is simply - location, location, location. This last couple days I've been figuring out economies of comparative advantage - which part of the Venus constellation will best serve as the capitol. My conclusion: not Venus itself.

I'm thinking of Libration Point "Trojan", L5, where people go when they want to leave early. Whoso useth L5, they isn't normal Venus / Earth jetsetters.

The Venus / Mars jet-set is different from Venus / Earth. The Mars-Venus synodic is more frequent but its Hohmann takes longer to get there. [For my dates I am assuming circular planet orbits, which we all know Mars' is not, so I shall type "-ish" here.] Say a Martian embassy arrives at Venus 1-ish July AD 2225. The next embassy for Venus leaves Mars 1-ish September; that replacement arrives 1-ish June 2226. So in event of a Martian recall, Martian interests in the System face about a seven month gap in representation at Venus. It gets worse for those planets further out.

For Mars, 1/6 of its year synodic with Venus is only 55 (Earth) days. Martian visitors from late 2225, if direct from Venus, depart back to Mars, 1-ish Feb 2226. Martian ducks lamed 2225 would be malingering for five months. But if they get to L5 by early December, they're off on that long trip home that much earlier. Belter (h/t "James AC Corey") ducks on Venus get a similar option. Earthling and Lunar ducks don't.

As a result: Venus' L5 hosts a Venus-Mars hotel and backchannel; independent of Earth, of Venus, and of the Venus main Station. (The exiting consuls like to spend the time editing their memoirs, so that L5 station is nicknamed "Parthia".) Here, also, is the Venus-region pool of Martians and Belters who might get picked to fill in for that planet's interests here, for seven months in Mars' case.

Venus' L5 as the least Earth-interested spot within Mars' orbit will find itself hosting the System government, such as it might be.

UPDATE 12/1/2020 - L5 also seems less stable than L4, based on Jovian data. Not by much though. Unsure about how regularly the five E>V and five V>E Hohmann cyclers get into SVL4 or L5 range by contrast with their regular returns to STL5.

Somewhere, humans will conduct experiments on managing life in near-solar space. Included: solar hydrogen and helium capture, radiation shielding, maintaining stability, managing low-G, solar monitoring. This would all be best done where Earth and even Venus interests are least. So here is Interplanetary University, as well.