 List of unnumbered trans-Neptunian objects: 2003

The List of unnumbered trans-Neptunian objects from 2003 refers to a catalog of trans-Neptunian objects (TNOs) that were discovered in that year but had not yet been assigned a permanent designation or number by the International Astronomical Union (IAU). Trans-Neptunian objects are celestial bodies located in the region of the Solar System beyond the orbit of Neptune, primarily in the Kuiper Belt.