UN activates global monitoring of interstellar comet 3I/ATLAS for two months
On November 27, 2025, Organização of Nações Unidas began an international campaign to monitor the interstellar comet 3I/ATLAS. The action involves Rede Internacional of Alerta of Asteroides (IAWN) and brings together scientists from different countries for two months. The object poses no threat to Terra.
The monitoring tests planetary defense protocols and takes advantage of the comet’s passage through the inner solar system. The campaign had been planned since 2024 for interstellar objects.
- Continuous observation runs until the end of January 2026
- Comet was discovered in July 2025 by the ATLAS system
- Trajectory maintains safe distance from the planet
The initiative marks IAWN’s eighth exercise since 2017.
Features of 3I/ATLAS
Comet 3I/ATLAS has a bright coma and an extensive tail. Registros show a greenish body and diffuse structure typical of objects composed of ice and dust.
Images captured by spacecraft at Marte, around 29 million kilometers away, confirm the natural composition. The photographs reveal normal cometary activity during the approach to Sol.
International participation in the campaign
IAWN member countries contribute ground-based and space-based telescopes. Observatórios in Japão, Espanha, Chile and Canadá record daily data.
Central coordination occurs through the UN’s Escritório of Assuntos Espaciais. Equipes exchange information in real time to refine orbital calculations.
Images that fueled speculation
Amateur astronomers released photos between November 21st and 24th. The records highlight a tail directed towards Sol and a conical shape surrounded by luminous fog.
One of the images, taken by a Japanese observer on November 22, shows anti-longtail. Outro Spanish registration reinforces irregular contour of the nucleus.
Official NASA response
The North American space agency analyzed the images and maintained the classification as a natural comet. Três spacecraft orbiting Marte provided supplementary data.
Associate Director Amit Kshatriya stated that the object exhibits behavior expected of interstellar comets. The statement came after a period of intense public debate.
Protocols tested during the passage
The campaign tweaks specific techniques to track objects entering the solar system from outside. Cometas Interstellars require greater precision because they have hyperbolic orbits.
Annual IAWN exercises improve the ability to predict the trajectories of diffuse bodies. The 3I/ATLAS offers extended visibility for instrument calibration.
Amateur observations complement data
Records made with telescopes 12 inches or smaller contribute to the global database. Imagens and Canadá show tail evolution in real time.
Independent observers send material directly to the network coordinated by the UN. Participation expands geographic coverage of monitoring.
Comet 3I/ATLAS follows the predicted trajectory and maintains a minimum safe distance from Terra throughout its passage through the inner solar system until the beginning of 2026.
