Man made items that are leaving the solar system

We all know about the 5 probes (Pioneers, Voyagers, and New Horizons). But there are other objects that are leaving the solar system as a result of those missions and we have no way to track them.

Pioneer 10 third stage, a TE364-4 variant of the Star-37 solid fuel rocket.[18]

Voyager 1 fourth stage, a Star 37E solid fuel rocket.[19]

Voyager 2 fourth stage, a Star 37E solid fuel rocket.[19]

New Horizons third stage, a Star 48B solid fuel rocket, is on a similar escape trajectory out of the Solar System to New Horizons, even arriving at Jupiter six hours before New Horizons. On October 15, 2015 it passed Pluto's orbit at a distance of 213 million kilometers (over 1 AU) distant from Pluto.[20][21] This was four months after New Horizons' Pluto flyby.[22]

In addition, two small yo-yo de-spin weights on wires were used to reduce the spin of the New Horizons probe prior to its release from the third-stage rocket. Once the spin rate was lowered, these masses and the wires were released, and so are also on an escape trajectory out of the Solar System