Intuitive Machines' Odysseus lander touched down on the moon Thursday after a historic, nail-biting descent following a last-minute navigation sensor malfunction, becoming the first U.S.-built spacecraft to stick a moon landing in more than 50 years and the first ever by a private company.

After delaying the final descent by one orbit to press an experimental NASA navigation sensor into service — and to test hurriedly-written software patches to route its data to the lander's flight computer — Odysseus settled to a touchdown at 6:23 p.m. EST near a crater known as Malapert A some 186 miles from the south pole of the moon.

But the spacecraft's condition was not immediately known. Engineers at Intuitive Machines' Nova control center in Houston expected it to take up to two minutes or so to re-establish communications after landing, but the expected signal was not immediately found.