Particle.news
Download on the App Store

Interstellar Visitor 3I/ATLAS Reappears in Earth’s Skies After Unusual Perihelion Surge

The key test now is whether the measured non‑gravitational acceleration is explained by heavy outgassing that would leave a vast coma detectable during the mid‑December Earth passage.

Overview

  • Solar and space observatories (STEREO, SOHO, GOES‑19) documented an unexpectedly rapid brightening, a distinctly blue hue, and measurable non‑gravitational acceleration near the October 29–30 perihelion.
  • Ground observers report the object is again visible before dawn, with early post‑perihelion images from Lowell Observatory and new small‑telescope detections led by Qicheng Zhang.
  • ESA’s JUICE spacecraft is conducting a targeted observing campaign through November 25, with data expected to reach analysts in early 2026 due to telemetry constraints.
  • Agencies emphasize there is no hazard to Earth, with closest approach projected for December 19 at roughly 167–170 million miles.
  • A minority of researchers, notably Avi Loeb, posit an artificial‑engine explanation, whereas most teams favor an unusual natural comet pending December searches for a large surrounding gas and dust cloud.