“2024 YR4” sounds less like a name and more like something printed on the back of a router. That is because it is a provisional designation—a practical label used while an object is still a newcomer.
The year is straightforward. The letters and number encode when in that year the object was reported and its order among other discoveries in that period. With thousands of small bodies entering catalogs, astronomers need a system that scales better than arguing over pet names.
Some asteroids eventually receive permanent numbers and proper names after their orbits are secure. Until then, YR4’s label does exactly what a good library code should: it keeps researchers worldwide focused on the same faint moving dot as its close 2032 appointment approaches.