3I/Atlas — Anomalous brightening event of 23 April 2026
A measured account of the day's principal case under Council review, with citation, location, and verdict status.
Multiple observatories report an unexpected 0.6-magnitude brightening of the third confirmed interstellar object, 3I/Atlas, between 21 and 23 April 2026. The Council is monitoring; current evidence does not require a non-natural explanation.