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A photograph taken from the surface of an asteroid by a small robot in 2018.

>> The field of view in the middle ground is approximately 30 cm. Would you explain that, please. Do you mean that what we see in the middle ground is ~30 cm wide, image edge to edge? Or something else. Thanks in advance.

That's pretty much correct yes. The lander itself was about the size of a shoebox. The funny thing about it is because of its size, it was essentially dropped onto the asteroid, where it bounced several times before coming to a rest and taking a bunch of photos over the course of 18 hours or so.

Sorry to clarify, it landed on the asteroid and hopped several times (it was designed to do so) over that 18-hourish period