Overview
- NASA, ESA, and NOIRLab report a hyperbolic trajectory for 3I/Atlas, confirming it will not return to the Solar System.
- Spectroscopy identified hydrogen cyanide, methane, water, and carbon monoxide consistent with ordinary comet chemistry.
- Astronomers measured a velocity near 60–61 kilometers per second, requiring rapid, coordinated observations across global facilities.
- Researchers describe 3I/Atlas as the third recorded interstellar object, following ‘Oumuamua (2017) and 2I/Borisov (2019).
- Separately, amateur astronomer Gennadiy Borisov reported C/2025 V1 (Borisov), which passed about 103 million kilometers from Earth on November 11, appears faint at roughly magnitude 13.8, and is projected to reach perihelion around November 16.