- Sedna (105,000 pop)
- Vesper (450 pop)
- Farther out than any other human settlement in the solar system other than Sedna's own colony of Vesper, Sedna also has a dramatically asymmetrical orbit that means in centuries to come its orbit will take it to an order of magnitude greater distance from the rest of the solar system.
- Sedna's closest approach was in 2075; compared to the far extremes of its orbital path Sedna in the 25th century is still relatively close, but with every year it gets farther out, culminating at its farthest point from the Sun in approximately 12,000 years.
- Sedna is technically not in the Kuiper Belt at all, but an unusually close part of the Oort Cloud.
- Sedna maintains a mining colony on another dwarf planet, Vesper.
- Like Europa, Sedna has a subterranean ocean, or in Sedna's case, a series of somewhat connected large subterranean lakes where most of the population has clustered.
- Settlement on Sedna began as a deep space research operation run by Union from Earth in 2340. As priorities shifted away from scientific endeavors, financing for the station ended after only twelve years of operation in 2352.
- Upon closure of the station, a cultural dissident group from Scandinavia purchased rights to the station, including extra-territoriality rights to preclude any further political claim from Union. The dissident group wrote its operating charter, purchased a pair of freighters and, loaded with equipment, supplies, and colonists, and in 2357 set off for the farthest reaches of the settled solar system.
- The Sedna All-Thing began with a modest population of almost 5,000, but received steady re-financing and immigration in its early years, burgeoning to its current population - which has since held relatively stable - by 2450.
- The majority of Sedna's population exists in settlements clasping the roof of Sedna's subterranean sea to benefit from the relative warmth and access to water.
- Although strictly speaking not even in the Kuiper Belt, the Sedna All-Thing joined the Kuiper Compact in 2465, and as such is the most recent member of association.
- Despite being a member of the Kuiper Compact, the Sedna All-Thing maintains fairly peaceable relations with the Orcus Directorate, primarily for reasons that both share a positional isolation from the main centers of population in the region.
- Silicates (on the mining colony of Vesper)
- Metals (on the mining colony of Vesper)
- Fissile Materials
- Because of its positional isolation, Sedna's economy is forced to be generalized and broad-based with few specialities
- Strong structural engineering industry
- Major fuel refinement center
- Major center of archaeological support and research operations
- The Sedna All-Thing is bound by mutual defense treaties with the Plutonian Assembly, Makemake, and Xena by means of its membership in the Kuiper Compact.
- The Kuiper Compact has frigid relations with the Orcus Directorate, something that is problematic for the Sedna All-Thing which has historically maintained friendly relations with the Directorate.
- As a part of the Kuiper Compact, the Sedna All-Thing has been sending aid to the Democratic Republic of Triton against the Protean League.
- The military force of the Sedna All-Thing is modest and somewhat ad hoc, but since its signing of the Kuiper Compact it has increased its efforts in this area in order to fulfill its obligations in this area. Still, it remains one of the militarily weaker political elements of the Kuiper Belt.
Politics and Culture:
- One benefit of Sedna's relatively low population - only slightly above 100,000 - is that it has been able to maintain an unusually pure form of democracy. The "All-Thing" is the Sednan parliament, save that there are no elections; every individual can vote on anything, or, at their discretion, proxy their vote on everything or a subset of decisions to another individual. There is, further, no physical All-Thing facility, with the decision-making done purely virtually.
- Sednans have a particular concept known as Ragnarök, taken from the Norse mythological concept of the end-of-the-world. The Sednan Ragnarök is the orbital inevitability of their eventual complete isolation from the rest of humanity as Sedna's orbit takes it orders of magnitude farther from the rest of the solar system on its 11,400 year journey around the Sun. This has deeply impacted the Sednan psyche, as while they are today part of the general community of humankind, the solar system, and the Kuiper Belt, they know eventually they will be on their own. The reality is that it will be many centuries before this becomes an issue, but to the Sednans, it is a reality that has come to reflect their outlook on life.
- Sednan culture emphasizes fundamental individual responsibilities combined with every individual's right to speak and be heard in community. Once a decision has been made, however, it is considered binding, and breaking this bond is punishable at its extremes by banishment from the All-Thing, a fate many consider worse than a death sentence.
- Linguistically, Sedna features a Scandinavian dialect that incorporates elements of Swedish, Norwegian, and Danish.
- Recreationally, Sednan culture places great emphasis on personal skill, mental and physical acuity, and cleverness. Puns, riddles, and games of rhetoric are considered comparable "sports" as racing or contact sports.