The farthest star from the sun, the identity of the mysterious "Sedna" where exactly from?

As we all know, there are 8 planets in our solar system, but before 2006, Pluto was also one of the big planets in our solar system, but, because scientists discovered another object called "Sedna" at the edge of our solar system in 2003, it was judged by many scientists to be a dwarf planet, but Sedna is much bigger than Pluto. This makes the real identity of Pluto once again suffer from questioning, finally in 2006 was dismissed by scientists, the real identity also from a large planet relegated to a dwarf planet. So, what is the origin of Sedna that made Pluto expelled?

Sedna is a very large, reddened Pluto-like object, which was discovered to be relatively distant, purely natural in the solar system at a long distance from Earth, with its perihelion in 76 astronomical units and aphelion in 928 astronomical units, 12,050 years to carry out a week of very large, highly elliptical road orbit.

Mido Brown discovered this object in 2003, thinking it was not a member of the Discrete Variable Disk or Kuiper Belt group because its perihelion was so long that it was unlikely to suffer from Jupiter's migration. Browne named this group the "inner Oort cloud", which, although it avoids the Sun, is still relatively close and may have been produced by a similar process. Sedna's appearance has long been determined to be very much like that of a dwarf planet.

One hypothesis is that Sedna's path is the result of a very large and long solar companion, and Nemesis is one of the most likely solar companions to be present. Nemesis is a dull planet and maybe the root cause of the many regular microbial swarms extinct on Earth, lunar collisions, and many long-period meteorite rotation paths. There is no evidence for the existence of Nemesis, and much direct evidence (such as collisional crater counts) calls into question its existence.

Robert Matthysse and Daniel Whitmire, two long-time experts on the existence of long solar companions, believe that an object located at 7,850 astronomical units and five times the quality of Jupiter could cause an object with a rotation path similar to that of Sedna.

Moby Belgrade and Ken Young have also clearly proposed an alternative view: Sedna was most likely produced in the vicinity of another stellar system (especially a brown dwarf with a mass 20 times smaller than the Sun), and it was later captured by the Sun in the context of the solar system's periphery.

There are still many unknown quantities in our solar system, and considering the neighboring planets, it is possible that the Sun's attraction can manipulate the sphere of 2 light (125,000 astronomical units).

The Oort cloud broadens outward to a level that does not easily exceed about 50,000 astronomical units. Although Sedna was discovered in the middle of the Kuiper belt and the Oort cloud, there are still hundreds of thousands of astronomical units in radius that have not been detected. The area between Mercury and the Sun is also still under constant scientific study.

There is still a high probability of certain discoveries in the unexplained regions of the solar system. At this stage, the part of the Earth, or third, is a lingering part.

According to data information, if people miss the opportunity to observe Sedna after 56 years, the next time it will take until 12,000 years later, Sedna will not reach perihelion again, but by the rate of people's intelligent technology, perhaps by that time, we have long been able to go to Sedna personally to explore the situation. What do you think?