Overview
- ESA’s JUICE will conduct targeted observations from November 2–25 with brief daily windows of about 30 minutes, with its datasets expected to reach Earth around February 2026.
- The comet reached closest approach to the Sun at roughly 1.35 AU and was hidden from terrestrial view, with ground-based visibility forecast to return in November near magnitude 12 in the morning sky in Virgo.
- Mars orbiters captured the object in early October from on the order of tens of millions of kilometers, and missions such as Psyche, Lucy and Europa Clipper have favorable lines of sight though public updates remain limited.
- Scientists aim to sample gases and dust released by solar heating, with estimates of about two tonnes of water vapor per second and JUICE’s SWI instrument seeking high‑resolution water spectra.
- 3I/ATLAS is only the third well-observed interstellar visitor, traveling on a strongly hyperbolic path, with a size estimated between roughly 440 and 5,600 meters and a speed near 220,000 kilometers per hour.