Map of the Universe
3I/ATLAS
Interstellar object · Interstellar comet in 2025
About 3I/ATLAS
On 2026-01-01, the date the map shows, 3I/ATLAS was 2.67 AU from the Sun; sunlight takes 22.2 minutes to reach it.
It is about 2 km across.
The map lists it as an interstellar object and shows it in the Solar System part of the map, drawn on the plane of Earth’s orbit (the ecliptic).
Discovered 2025-07-01; perihelion 2025-10-29 at 1.36 AU; eccentricity 6.14, the most hyperbolic object yet seen.
Key numbers
| Perihelion | 1.356 AU |
|---|---|
| Orbit | Hyperbolic (unbound) |
| Eccentricity | 6.1398 |
| Inclination | 175.11° |
| Radius | 1.0 km |
| Distance from the Sun | 2.67 AU |
Where it is
Its place in the universe, from the inside out: Solar System › Orion–Cygnus Arm (Local Arm) › Milky Way › Local Group › Virgo Supercluster › Laniakea Supercluster › Observable universe.
Zoom out to see it in context: Jupiter's orbit, a view about 14 AU across.
From Wikipedia
3I/ATLAS, also known as C/2025 N1 (ATLAS) and previously as A11pl3Z, is an interstellar comet discovered on 1 July 2025 by the Asteroid Terrestrial-impact Last Alert System (ATLAS) station. The comet follows an unbound, hyperbolic trajectory past the Sun, and passed by Earth at 1.8 AU, posing no threat.
Excerpt from the Wikipedia article 3I/ATLAS, licensed CC BY-SA 4.0.