Sedna's Detached Orbit & the Inner Oort Cloud (2D)

This 2D companion to the Sedna orbital simulator runs the exact same Kepler-orbit propagation — Neptune, a classical Kuiper belt object, a scattered-disk test object, Sedna and 2012 VP113 all advancing on true ellipses solved via Newton–Raphson — but renders it as a pannable, zoomable bird's-eye map rather than a free 3D camera. Beyond Neptune, the Kuiper belt gives way to a scattered disk of comet-like bodies whose closest approach to the Sun still passes near Neptune's orbit, letting the giant planet keep flinging them around. Sedna and 2012 VP113 break that pattern: their perihelia lie tens of AU beyond Neptune's gravitational reach, making them dynamically detached from the rest of the known Solar System. Dial in your own object's semi-major axis, eccentricity and inclination and watch its orbit visibly foreshorten and its perihelion cross the coupled/detached boundary in real time, with live perihelion, aphelion, period and classification readouts.