Hygiea

Indeed, there are multiple other relatively massive bodies — Vesta, Pallas, and Hygiea — also in Ceres' vicinity.

That’s what my “Hygiea” piece is at the Armory.

Hygiea would be the smallest dwarf planet with a rotation rate of around 13.8 hours.

The findings and new images that suggest Hygiea is actually a dwarf planet were published in Nature Astronomy by astronomer Pierre Vernazza of the Laboratoire d’Astrophysique de Marseille in France and his team of researchers.

Hygiea is the main member of one of the largest asteroid families that originated from the same parent body.