- Minor planet 24. A C-class asteroid
with a diameter of 220 km, discovered in 1853 by A. de Gasparis. It
orbits in the main body of the asteroid family that bears its name (see
Themis family); semimajor axis 3.13
AU, perihelion 2.71 AU, aphelion 3.55 AU, inclination 0.8°. In 2008
and 2009, two teams of scientists independently announced the discovery
of water-ice on the surface of Themis, lending credence to the idea
that colliding asteroids (as well as comets) delivered large quantities
of water to Earth in the remote past.
- A satellite of Saturn reported by William
Pickering in 1898 to be in orbit
between Titan and Hyperion, but subsequently not seen again.