Rosetta's Philae Spacecraft Found

Lost Lander Found

Philae is a robotic European Space Agency (ESA) lander that accompanied the Rosetta spacecraft until it separated to land on comet 67P/Churyumov-Gerasimenko in 2014. on November 12th, 2014, Philae touched down on the comet, but it bounced when its anchoring harpoons failed to deploy and a thruster designed to hold the probe to the surface did not fire. Despite the landing problems, the probe's instruments obtained the first images from a comet's surface along with some instrument data.

On November 15th, 2014, Philae entered hibernation after its batteries ran down due to reduced sunlight and poor spacecraft orientation. Although Philae has communicated sporadically with Rosetta as recently as July 9th, 2015, it has mostly remained silent recently. On September 2, 2016 as the Rosetta orbiter was sent on orbits closer to the comet, it was able to identify the exact location of the lander.

Here's an article that details the location of Philae and what went wrong:

No Longer Missing: Rosetta’s Philae Spacecraft Located on Comet

With its legs poking out of a dark crevice on a speeding comet many millions of miles away, the Philae spacecraft, missing since 2014 after a 10-year trip, has finally been

found. Scientists at the European Space Agency announced on Monday that they had located the lander, which touched down on Comet 67P/Churyumov-Gerasimenko on Nov. 12, 2014. The landing did not go as planned; the spacecraft bounced and flew for two hours, then lost touch with the agency three days later when its primary battery died and it went into hibernation. The lander briefly awoke in June 2015 and again in July 2015, but hadn’t been heard from since. Its location had been unknown. On Sept. 30, the Rosetta orbiter is scheduled to make its final descent to the comet’s surface, which is about the length of Central Park. Just in time, photos taken by the orbiter 2.7 kilometers (about 1.7 miles) away on Friday revealed the main body of the missing lander, which is about the size of a washing machine, and two of its three legs.

“This remarkable discovery comes at the end of a long, painstaking search,” Patrick Martin, manager of the space agency’s Rosetta mission, said in a statement on Monday. “We were beginning to think that Philae would remain lost forever. It is incredible we have captured this at the final hour.”

The lander bounced upon impact when a thruster failed to fire, and two harpoons meant to anchor it to the surface did not deploy. Scientists had narrowed its location down to an “area spanning a few tens of meters,” but the images available before Friday were in low resolution, and they showed several objects that might have been the lander.

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