Astronomers surprised by large space rock less dense than water
A planetary scientist has identified the largest-known solid object in the Solar System that could float in a bathtub. The rock-and-ice body, which circles well outside the orbits of the planets, is less dense than water - although a bathtub big enough to hold it would stretch from London to Frankfurt. Read more
Kuiper Belt Object (55637) 2002 UX25 is a Spitzer dwarf-planet candidate that orbits the Sun in the Kuiper belt beyond Neptune. It takes roughly 280 years to orbit the Sun, and it has one known moon. Read more
The discovery of a satellite of 2002 UX25 was reported in IAUC 8812 on 22 February 2007.