Philae lander was found by Rosetta’s high-resolution camera on Comet 67P/Churyumov–Gerasimenko.
Comet 67P/Churyumov–Gerasimenko. 1
Philae found! / Rosetta / Space Science / Our Activities / ESA
http://www.esa.int/Our_Activities/Space_Science/Rosetta/Philae_found
1 This file is licensed under the Creative Commons Attribution-ShareAlike 3.0 IGO license. Attribution: ESA/Rosetta/NAVCAM, CC BY-SA IGO 3.0.