December 07 – Discovery of Asteroid 423 Diotima (1898)

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 of Mantinea
Diotima of Mantinea

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?