Nice! These 60 - 100 AU semi-major axis, low eccentricity (so roughly 60 - 100 AU perihelion) objects fill in the gap that the Planet Nine theory could not:
"Another curious feature of the distant scattered disk is the lack of objects with perihelion distance in the range q = 50 − 70 AU. It is yet unclear if this property of the observational sample can be accounted for, ..."
Old Sol has many children. Some have moved so far away they can never see his face. Just like people. How long are orbits stable? Years ago who would have thought how much change of arrangement our own solar system has undergone? Seemingly wild theories now ring true. The influence of this single star reached amazing distances.
This system can be viewed as several interconnected systems of coupled periodic oscillations. 1. Orbits are periodic oscillations. 2. Kozai resonance is a coupling between two other types of periodic oscillations.
The relevant facts are in the penultimate paragraph.
A. One of the new objects is in a 1:4 orbital resonance with Neptune.
B. One or more other new objects are in a 1:3 orbital resonance with Neptune.
C. The new objects are in a 4:3 resonance with each other. 4:3 orbital resonances are common, including synchronized systems of exoplanets with extremely short orbital periods. See my comments at "Alien solar system boasts tightly spaced planets ..." Physorg July 21, 2016.
D. Kozai resonance is a coupling between (1) the eccentricity of an orbit and (2) the inclination angle of the plane of an orbit. Periodic oscillations in (1) exchange or couple with periodic oscillations in (2). Libration is periodic oscillation around a mean.
torbjorn_b_g_larsson
Jul 21, 2016"Another curious feature of the distant scattered disk is
the lack of objects with perihelion distance in the range
q = 50 − 70 AU. It is yet unclear if this property of the
observational sample can be accounted for, ..."
[ https://arxiv.org...38v1.pdf ]