A commercial robotic lander developed by the Japanese company ispace was supposed to land on the moon at 12:40 p.m. EDT (1640 UTC) Tuesday, attempting to make history as the first privately-funded enterprise to achieve a controlled touchdown on the lunar surface. But mission controllers lost contact with the spacecraft just before landing.

Veteran Russian cosmonaut Oleg Kononenko, flanked by Japanese flight engineer Kimiya Yui and NASA astronaut Kjell Lindgren, boarded a Soyuz landing craft Friday and made a parachute-assisted touchdown in Kazakhstan at 1312 GMT (8:12 a.m. EST) to close out more than 141 days on the International Space Station.

Powered by two Russian-made RD-181 main engines, a Northrop Grumman Antares rocket fired into a mostly sunny sky Saturday afternoon over Virginia’s Eastern Shore carrying nearly 7,500 pounds of equipment to the International Space Station.