Southern Astrophysical Research Telescope (SOAR) Archives - Astrobiology

Series of zoomed in images from observations of 3I/ATLAS on UT 2025 July 9. Each panel is a single 30.0 s exposure taken in 𝑟′-band and 3I/ATLAS is identified within the red circle. -- astro-ph.EP

Astronomy & Telescopes, Comets and Asteroids, Interstellar, Status Report

Near-Discovery SOAR Photometry of the Third Interstellar Object: 3I/ATLAS

by Keith CowingSeptember 6, 2025September 6, 2025

3I/ATLAS was discovered on UT 2025 July 1 and joins a limited but growing population of detected ∼102−103 m scale interstellar objects.