Work / Tool

Ephemeris

When the Space Station crosses your sky, to the minute, with the chart to find it.

Address
theephemeris.vercel.app
Kind
Tool
Captured
October 15, 2026
Visit the Site: Ephemeris, opens in a new tab
theephemeris.vercel.appEphemeris's first screen at 1440 wide, captured October 15, 2026.

In its own words

When the Space Station crosses your sky, to the minute, with the chart to find it. SGP4 on CelesTrak's orbital elements, computed in your browser, checked against the Vallado 2006 verification set. The minute it appears, the arc to follow, the minute it fades into the Earth's shadow.
Start Yours
Ephemeris's home page from top to bottom.
The whole home page, top to bottom
Ephemeris's first screen on a phone, 390 wide.
On a phone, 390 wide