Suicide runs with images relayed back to the main bus for rebroadcast to Earth.

With DART it was the other way around…a camerabot that lasted just long enough to photograph the main bus impact and relay that back before itself died.

https://en.wikipedia.org/wiki/Small_satellite
On the right side is a list of satellite sizes and their nomenclature. Pico satellites are 0.1 to 1 kg, which is the weight range of the 10 cm CubeSat. Scroll down for the picosat writeup.

Because of the increase in smallsats, miniaturization has become common for satellites, including for CubeSats. CubeSats were invented by a couple of college professors who had satellite design and operation classes at their colleges. They invented the idea in order to standardize launch release mechanisms for piggyback satellite launches, called “secondary payloads” in the article. Secondary payloads used to be a pain for launch providers, but standardization has made them much more common. SpaceX calls its program “Rideshare,” where there is no primary payload, just a bunch of “piggyback” payloads.

The world of orbital launch has changed a lot, in the past fifteen years.

They can be used for a multitude of purposes. Students learn a lot about satellites by designing, building, launching, and operating one. Optics have become compact enough to fit within thin cell phones (these aren’t the optics of my college days), so picosats can perform some amount of observation and exploration. They don’t have large solar arrays, so high power operations are not available, so no high traffic communications. They can be used for technology development and proof of concept.

Space hardware companies now supply miniaturized parts, but because a CubeSat may have a brief mission and lifetime, sometimes non-hardened parts are used, because they will last long enough in the radiation environment to complete the mission, and such off-the-shelf parts don’t cost much.