note: Answer(s) to Why is a corner of InSight's selfie cropped like this? don't address this question about Curiosity for several reasons:
- It doesn't even answer that question properly.
- Insight is not a rover and does not have anywhere near the same number of additional cameras as does Curiosity.
- Insight does not produce nearly as many photos per camera as does Curiosity, because (did I mention) Insight is not a rover, and so there is less public activity analyzing, composing montaging and otherwise working with it's images as there is for Curiosity's large body of photographic work.
- I can't prove it but I'll bet there has been fewer full selfies initiated by Insight than by Curiosity.
The new NASA video How NASA's Mars Curiosity Rover Takes a Selfie answers the question I always wanted to ask; How (the heck) does Curiosity take its selfie?
The video shows the rover's robotic arm move MAHLI (the Mars Hand Lens Imager) through a wide range of positions and directions.
Presumably the video shows this because there's another camera on the rover imaging the robotic arm.
And yet the robotic arm is missing from the final image.
Question: Why is this part of the rover therefore still missing from most selfies? Has this been discussed in authoritative sources? Have attempts been made to include it, at least in black-and-white?
GIF from screen shots from the linked video demonstrates the wide range of motion and orientation of the robotic arm as seen from another camera on Curiosity.
From Seventeen Cameras on Curiosity**: