Science Release: NSF–DOE Vera C. Rubin Observatory Reveals Its First Dwarf Planet Candidate in Our Solar System

A Milestone Discovery Beyond Pluto

The NSF–DOE Vera C. Rubin Observatory has detected a prominent trans-Neptunian object designated 2026 ED138 in the distant outer reaches of our Solar System. Located far beyond the orbit of Pluto, this large and exceptionally bright body has been identified by astronomers as the observatory's very first dwarf planet candidate.

Official Announcement by the Minor Planet Center

The observations and preliminary tracking data were officially released by the International Astronomical Union's Minor Planet Center (MPC). Initial photometric and positional evaluations highlight that the object exhibits sufficient size and luminosity to be considered a premier candidate for hydrostatic equilibrium in the trans-Neptunian population.

Implications for the Outer Solar System

Should ongoing observations confirm its dwarf planet status, 2026 ED138 would rank among the largest dwarf planets ever documented in this remote realm of the Solar System. The discovery marks an exciting milestone for planetary astronomy, demonstrating the powerful survey capabilities of the Rubin Observatory in uncovering major unseen bodies in the cosmic backyard.