3i/Atlas Comet Tracker
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track 3i/atlas comet
Track the live orbit of interstellar comet 3I/ATLAS and get observing guidance, telemetry, and timeline updates in one place.
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What does 3i/Atlas Comet Tracker do?
3i/Atlas Comet Tracker is a dedicated hub for following interstellar comet 3I/ATLAS—from live orbital positions to practical observing guidance and the latest updates. It’s built for comet hobbyists who want to watch an unusual, once-in-a-lifetime visitor with continuously refreshed context.
The experience centers on real-time tracking, including an at-a-glance view of key observational parameters like sun distance (1.36 AU), earth distance (1.50 AU), and velocity (58.0 km/s), along with sky position (RA/DEC). You can also access observing guidance to help plan your viewing based on the comet’s current geometry and expected activity.
To place observations in context, the site includes a mission timeline from discovery through perihelion and onward departure. Milestones include first detection on July 1, 2025, orbital confirmation of its interstellar nature on July 15, 2025, perihelion on October 29, 2025, a closest-approach-to-Earth observing opportunity on December 19, 2025, and a departure phase beginning March 1, 2026.
There’s also a live telemetry stream and an “Exploring/Learn” section for science background and definitions. 3i/Atlas Comet Tracker is free to use.
What can I do with 3i/Atlas Comet Tracker?
Track comet 3I/ATLAS’s live orbit, view observing guidance, follow updates, and explore the comet’s timeline and science context in one place.
Does it provide real-time orbit information?
Yes. You can view a live orbit view and key observational readouts such as distances, velocity, and RA/DEC.
What observing guidance does it include?
It offers an observing guide designed to help you plan around where the comet is and when key opportunities are expected during its passage.
How does the timeline help me follow the comet?
It lays out major milestones from discovery to departure, including completed events like perihelion and the closest-approach-to-Earth observing opportunity.
Is there live telemetry available?
Yes. The site includes a live telemetry stream alongside the tracking and observing views.
Is 3i/Atlas Comet Tracker free to use?
Yes, it’s free.
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