Provisional designation systems have been devised to label objects that have just been discovered. Distant objects can be immediately labeled by their position on the celestial sphere, but for newly-discovered solar system objects (e.g., minor planets), a system independent of position is necessary. A survey-based designator is often used, but general systems have also been adopted that uses the date and order of discovery. The need for such a system stems from the huge number of objects discovered, and that along with the certain discoveries are observations insufficient to rule out known objects and observations that provide inadequate information to enable identification of the same object in the future.
The system for minor planets:
Example: 2016 EK156
Permanent numbers are also assigned to minor planets when they receive their provisional designation and are kept by minor planets subsequently given a permanent name. The term numbered object refers to a minor planet that has received such a number.
For comets, systems are used that are different in detail, but also based on the year.