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Trajectory

Tracking 3I/ATLAS Through Space

Real-time position, distance, and visibility data for the interstellar visitor

Critical Trajectory Milestones
Mars Flyby
Closest approach to Mars
Oct 3, 2025
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Perihelion
Closest approach to the Sun
Oct 29, 2025
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Venus Flyby
Closest approach to Venus
Nov 3, 2025
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Earth Flyby
Closest approach to Earth
Dec 19, 2025
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Jupiter Flyby
Closest approach to Jupiter
Mar 16, 2026
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Current Position in Space
Where to Look Tonight
Key Facts
Discovery Date
July 1st, 2025
Estimated Size
1 km diameter
Current Speed
N/A
Origin Direction
Constellation Sagittarius
What is 3I/ATLAS?
Learn everything we know about this mysterious interstellar object
Observation Guide
Learn how and when to observe 3I/ATLAS from your location
Latest Updates
Stay informed with the newest observations and discoveries

How Big is 3I/ATLAS? The Massive Interstellar Visitor Revealed

4 days ago

Did 3I/ATLAS Deploy a Scout? New Comet SWAN Arrives from Completely Different Direction

8 days ago

The Green Glow That Shouldn't Exist: 3I/ATLAS Defies Comet Chemistry

10 days ago