Interstellar comet 3I/ATLAS reaches perihelion and follows a hyperbolic trajectory in the Solar System. The object, detected in July 2025 by the ATLAS project in Chile, moves at around 210,000 km/h. It represents the third known interstellar body, after 1I/ʻOumuamua and 2I/Borisov.
Astronomers follow the comet using ground-based telescopes and space probes. The passage takes place without risk to Earth, with a minimum distance of 270 million km on December 19th. Online platforms allow real-time viewing.
- Speed: 210 thousand km/h;
- Distance from Earth: almost 700 times the Earth-Moon average;
- Exit from the Solar System: scheduled for January 2026.
Detection and orbital characteristics
Comet 3I/ATLAS was identified in July 2025. Its hyperbolic orbit confirms its origin outside the Solar System.
NASA calculations indicate recent perihelion. The object begins its return to interstellar space.
Images captured by probes
Chinese probe Tianwen-1 recorded details of the comet’s coma. The photos show cloudof dust and gas around the nucleus.
European Mars Express and ExoMars Trace Gas Orbiter missions obtained additional images. They highlight anti-tail, a rare optical phenomenon.
These records mark the first capture of an interstellar body by probes on Mars. The comet’s brightness is 10,000 to 100,000 times dimmer than usual Martian targets.
Platforms for online monitoring
Websites update 3I/ATLAS position in real time. The Sky Live informs current constellation and distance from Earth.
3IAtlasLive offers interactive 2D maps with data from the Horizons system. NASA’s Eyes on the Solar System simulates trajectory in 3D.
YouTube channels broadcast visualizations based on information from JPL and Minor Planet Center. These tools use official data for accuracy.
Composition and scientific relevance
The comet preserves materials from the formation of other stellar systems. Analysis helps to understand conditions in the early Universe.
Studies focus on the chemical composition of the nucleus and coma. Data contributes to models of planetary formation outside the Sun.
Passage does not activate planetary defense protocols. Mapped trajectory excludes collision risks.
Observation and accessible data
Amateur telescopes capture the comet with suitable equipmentyou. Brightness requires instruments for visibility.
Free platforms facilitate access to simulations. Users visualize displacement relative to planets.
Information from the Minor Planet Center updates ephemerides daily. This allows for accurate tracking by researchers and enthusiasts.
