Yes — it comes from NASA NHATS and is refreshed on a schedule.

Why rank by delta-v rather than distance?

Because delta-v is what actually costs fuel. An asteroid that passes close but fast is far harder to reach than a distant one whose orbit is well matched to Earth's.

No. This source is fully key-less.

Yes — free, no download, in your browser.

Reachable Asteroids Screensaver

The Reachable Asteroids screensaver shows near-Earth asteroids a crewed mission could genuinely reach, from NASA's NHATS study, ranked by the lowest total delta-v any trajectory needs — the real cost of getting somewhere in space. It's free, runs in your browser, and ESC exits.

How the Reachable Asteroids screensaver works

The background pipeline reads this from NASA NHATS and saves a snapshot the saver loads.

Near-Earth asteroids a crewed mission could genuinely reach, from NASA's NHATS study, ranked by the lowest total delta-v any trajectory needs — the real cost of getting somewhere in space..

It refreshes on a schedule, so what you see stays current.

Colours can be changed in settings; nothing is stored beyond your own browser.

A worked example

Near-Earth asteroids a crewed mission could genuinely reach, from NASA's NHATS study, ranked by the lowest total delta-v any trajectory needs — the real cost of getting somewhere in space.

Settings & tips

Accent and Background recolour the display.
Run automation/run.py nhats to refresh the feed.
Press ESC to leave fullscreen.

Frequently asked questions

Is this real data?: Yes — it comes from NASA NHATS and is refreshed on a schedule.
Why rank by delta-v rather than distance?: Because delta-v is what actually costs fuel. An asteroid that passes close but fast is far harder to reach than a distant one whose orbit is well matched to Earth's.
Is a key needed?: No. This source is fully key-less.
Is it free?: Yes — free, no download, in your browser.

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