Orbital Watch — live satellite tracking and collision screening

Orbital Watch tracks 18,643 real objects from the public CelesTrak catalog (every active satellite plus four debris clouds), propagates them with SGP4 on a 3D Earth, and screens every pair for close approaches over the next 24 hours, reporting miss distance, time of closest approach and the radial / in-track / cross-track miss vector. It includes an interactive physics lab explaining Kepler's equation, vis-viva, orbital elements, J2 perturbation, TEME to ECEF frames, the RIC frame and golden-section search. JavaScript and WebGL are required to run it.

Adam Tamer — portfolio

ORBITALWATCH

Space situational awareness · conjunction assessment

Initialising globe…

Following —

Every dot is a real satellite, where it is right now. Hover to see what it is, click one to ride along. Scroll to zoom, drag to orbit. Tap a dot to ride along with it. Pinch to zoom.

Conjunction screening · next 24 h

<1 km <5 km <25 km

Miss (km)	TCA (UTC)	Primary	Secondary	Rel. speed	Radial / In-track / Cross