Alerts

Get told only when it matters.

Set your thresholds. We'll reach out when a real tracked object crosses them — and never otherwise.

How should we reach you?
Notify me when…
A pass comes closer than5 LD
5× the Moon's distance
The object is larger than30 m
Building-sized and up
How we treat your data
One-click unsubscribe in every message.
We never sell or share your address.
No marketing. No digests. Threshold hits only.
Calm by design — we don't do red-alert klaxons.
Example alert
> 2025 BC passes in 4 days
0.6 LD · 12–28 m · 11 km/s
Tracked — not on a collision course.