A new "main-belt comet" — a comet-like object masquerading as an asteroid in the asteroid belt between Mars and Jupiter — has been identified, bringing the tally of these beguiling objects up ...

The object, discovered in 2021 and given the temporary name 2021 L4, orbits between Mars and Jupiter in the main asteroid belt, taking 3,956 days (10.83 years) to do so.