Assuming your math is correct (and I have no reason to doubt that it is) a mass of 10^16 kg would actually be a pretty small moon or moderately sized asteroid. That's actually roughly the mass of Mars' moon Phobos (which is the 75th largest planetary moon in the Solar System).

[–] Zink@programming.dev 2 points 5 days ago

I was thinking of 10^16kg diamond storage inside a larger SSD that’s the size of a large moon, similar to how a real SSD has data stored in tiny little slivers of silicon inside a much much larger device.

I should have explained that one better. It’s easy to imply such details to keep text shorter.

[–] Tja@programming.dev 1 points 5 days ago (1 children)

Out of curiosity, why did you say planetary moon? Is there any other kind?

[–] itslilith@lemmy.blahaj.zone 3 points 5 days ago (1 children)

Dwarf planets sometimes have moons (e.g. Pluto)

[–] CrazyLikeGollum@lemmy.world 2 points 5 days ago (1 children)

Some large asteroids have moons too.

[–] VoidJuiceConcentrate@midwest.social 1 points 3 days ago (1 children)

this leads to the question: are they still considered a moon when the barycenter is in the space between them?

[–] CrazyLikeGollum@lemmy.world 2 points 3 days ago

There is no clear definition of what constitutes a moon other than it being a body that orbits another body that orbits the parent star.

There are some astronomers who say the dividing line between a moon-planet/dwarf planet/asteroid system and binary (or more) planet/dwarf planet/asteroid system is whether or not the barycenter of the orbits is within one of the bodies or not.

And fun fact: if that definition gained acceptance, it would mean that the Pluto-Charon system would go from a dwarf planet-moon system to a binary dwarf planet system. Charon could get a promotion.