International Astronomical Union

What to know

• The Vera C. Rubin Observatory in Chile identified 2026 ED138, a 600‑1500 km trans‑Neptunian object. Oct 29
• It lies about 46 times farther from the Sun than Earth, roughly 1.1 billion miles beyond Pluto. Oct 29
• The Rubin Observatory detected 2026 ED138 during LSST preparatory runs. Oct 29
• If confirmed, it would join Ceres, Pluto, Eris, Haumea and Makemake as a dwarf planet. Oct 29
• About 96% of the Moon will be covered by Earth's shadow during this deep partial lunar eclipse. Aug 26