European spacecraft tested at the L1 earth-moon Lagrangian point that tested technologies for the Evolved Laser Interferometer Space Antenna (eLISA), an ESA gravitational wave observatory planned to be launched in 2034. LISA Pathfinder demonstrated that eLISA mission was feasible. Technology Experiments satellite built by EADS Astrium => Airbus Defence and Space for ESA, Europe. Launched 2015.
First Launch: 2015-12-03. Last Launch: 2015-12-03. Number: 1 . Gross mass: 480 kg (1,050 lb).
LISA Pathfinder - .
Type: Astronomy satellite. Spacecraft: LISA Pathfinder.
USAF Sat Cat: 41043 . COSPAR: 2015-070A. Apogee: 24,805 km (15,413 mi). Perigee: 748 km (464 mi). Inclination: 6.00 deg. En route to L1 Lagrangian point..