1 Cent - Elizabeth II (4th Portrait - Planetary Coins - Pluto)

This 2017 Australian one-cent coin featuring Pluto is part of a non-circulating commemorative series known as the Planetary Coins collection. While the Australian one-cent denomination was officially withdrawn from circulation in 1992, these private-issue novelty pieces were minted for collectors to celebrate the celestial bodies of the solar system, utilizing the established fourth portrait of Queen Elizabeth II by Ian Rank-Broadley on the obverse.

The design follows the tradition of colorized or themed numismatic collectibles that prioritize decorative appeal over monetary function. By pairing the effigy of the monarch with artistic interpretations of the dwarf planet Pluto, the set targeted astronomy enthusiasts and hobbyist collectors. The series was met with modest interest within niche numismatic circles, serving primarily as a tribute to space exploration rather than a significant addition to the Australian currency system.