One of the Martian moons travels between the rover and the sun. It’s a bit different to my usual posts, and not my OC :).
I believe it’s Phobos, so there might be doom music kicking in any second now…
That’s a very curious shape for a moon.
It’s technically just a random rock plucked from the asteroid belt. It’s just not big enough to crush itself into a neat ball with gravity, like with planets or our Moon