We know very little about the discrete disk, although the mainstream view of astronomy believes that it was in the early process of the formation of the solar system, becauseNeptuneThe gravitational disturbance caused by outward migration isKuiper beltScattering into high tilt and highEccentricityIn the track.In contrast, the Kuiper Belt is like a relatively "round" and "flat" doughnut with a flat circular orbit(QB1 like objects)And slightly ellipticalresonanceTrack(Plutonian Object ), constraining the celestial body within a circle of 30 to 44 astronomical units;The orbit environment of the ecliptic discrete objects in the discrete disk is strange.The discrete celestial bodies of the ecliptic are represented bydwarf planetEris For example, the distance in the vertical direction of the ecliptic is almost as far as the distance from the sun in the parallel direction;The orbital simulation also shows that the orbits of the ecliptic discrete objects are strange and unstable, and will eventually be thrown from the core region of the sun toOort CloudEven more distant places.
There are some indicationsCentaursObjects that are simply ejected inward from the Kuiper Belt, rather than outward, can be called "cis Neptunian objects".In fact, some celestial bodies, like1999 TD10These views have been blurred, soAsteroid centerThe ecliptic discrete objects and centaurs have been listed together.According to this confusing category, some scientists have changed to“scattered Kuiper belt object ”(scattered Kuiper belt object, SKBO) to cover or collectively refer to the centaur herd and the celestial bodies in the discrete disk.
althoughExtraNeptune objectsSednaIn the officialAsteroid centerIt was identified as a discrete celestial body of the ecliptic, but the discovererMichael Brown Because of itsPerihelionThe distance is up to 76 astronomical units, and it is not likely to be affected by the gravitational disturbance of the planet, so it should beOort CloudThe inner celestial body should not be a discrete celestial body of the ecliptic.