Celeste () is a Low Earth orbit Positioning Navigation Timing (LEO-PNT) satellite constellation by the European Space Agency (ESA) intended to demonstrate the usefulness of LEO satellites for complementing and enhancing the services of higher orbit systems like Galileo or EGNOS. The first two satellites were launched in March 2026. Celeste was named after Maria Celeste, a 17th-century Poor Clares nun and a daughter of Galileo Galilei.
First two satellites (IOD1-2, Pathfinder A type), in the form of large CubeSats, one 12U and one 16U, were launched on 28 March 2026 on a Rocket Lab's Electron launch vehicle's flight "Daughter Of The Stars" from Launch Complex 1 on MÃÂhia Peninsula, New Zealand to a quasi-polar orbit. This was Rocket Lab's first launch for ESA.
Later, eight of the larger and more complex Pathfinder B satellites will be launched to similar orbits. The entire constellation of 10 satellites is planned to be completed in 2027.