Asteroid 423 Diotima was discovered from Nice by Auguste Charlois on December 7th, 1898. It’s in the main belt, is a C-type, is fairly large (approximately 170 by 140 km) and rotates once about its axis every 4.8-ish hours.
Diotima has a semi-major axis of a little over 3 AU. Semi-major axis sounds worse than it is. It’s just the longest radius of of an elliptical orbit.
Diotima was named, by the Heidelberg Astronomisches Rechen-Institut, or Astronomical Calculation Unit, after one of Socrates’ teachers, Diotima of Mantinea, a woman whose existence remains uncertain; the jury is still out on whether or not she was simply a creation of Plato. It is from the teachings of Diotima that we get the concept of platonic love. I can’t help thinking there’s a clue to her existence (or lack of it) in that name. Surely it would have been diotimic love?