Asteroid Tracker

Near-Earth asteroids making close approaches to Earth, straight from NASA/JPL close-approach data. See each one's estimated size, relative speed, how close it passes in lunar distances, and when. Anything passing inside the Moon's orbit is flagged. Free, no sign-up.

Upcoming close approaches

These are close approaches, not impacts. Each asteroid's orbit is known and it passes by at a computed distance. This is for curiosity, not hazard warnings — for authoritative information see NASA CNEOS.

100% free, no sign-up Live data from NASA/JPL No API key, nothing stored

ISS Tracker

Watch the International Space Station orbit Earth in real time on a world map — live latitude, longitude, altitude and speed.

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Sky Explorer

Pan and zoom across the real night sky — galaxies, nebulae and star fields from professional survey imagery.

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How It Works

Open it and the upcoming close approaches load — no account, no key.

1

Choose a window and distance

Pick how far ahead to look (7, 30 or 60 days) and how close an approach must be to appear — from within 1 lunar distance to within 20. The list updates from the live NASA/JPL feed.

2

Read each approach

Every row shows the asteroid's designation, an estimated size, its relative speed, the miss distance in lunar distances and kilometres, and the date of closest approach.

3

Spot the close ones

Any asteroid passing inside the Moon's orbit (under 1 lunar distance) is flagged. These are still harmless flybys — just unusually close. Then follow the ISS overhead.

Frequently Asked Questions

What is a lunar distance?
A lunar distance (LD) is the average Earth–Moon distance, about 384,400 km. Astronomers use it for asteroid flybys because it gives instant scale: 1 LD is as close as the Moon, 20 LD is twenty times farther. The tracker shows each miss distance in both LD and kilometres.
Are any of these asteroids going to hit Earth?
No — these are close approaches, not impacts. Each orbit is known and the asteroid passes at a computed distance. A pass within a few lunar distances is common and harmless. For authoritative hazard assessments see NASA CNEOS and the Planetary Defense Coordination Office.
How is the asteroid's size estimated?
From the asteroid's absolute magnitude (intrinsic brightness), because most near-Earth asteroids are never imaged directly. A dark rock and a bright rock of different sizes can look equally bright, so the size is given as a range based on typical reflectivity — an approximation, not a measured diameter.
Where does the data come from and is it free?
Every approach comes from NASA's Jet Propulsion Laboratory CNEOS Close-Approach Data API, a free public service. The tracker is completely free — no account, no sign-up, no API key.