Phobos seen from the Martian surface, Curiosity sol 45 (September 21, 2012)
Just after sunset local solar time, Curiosity turned its narrow-angle Mastcam-100 toward the sky to image a crescent Phobos. This version is a slightly processed version of a raw image (blemishes and hot pixels have been cleaned up); it will likely be replaced later with an official release.
Here is a zoomed-in version:
NASA / JPL / MSSS / Emily Lakdawalla
Zoom in to Curiosity image of Phobos, sol 45
Contrast has been adjusted slightly to bring out a bit more detail. This version will likely be replaced later with an official release.
This image is in the public domain.
Original image data dated on or about September 21, 2012