List of unnumbered minor planets

The following is a list of unnumbered minor planets in chronological order of their principal provisional designation. Contrary to their numbered counterparts, unnumbered minor planets have a poorly determined orbit due to insufficient observational data. This also includes lost minor planets which have not been observed for many years, or even decades. As of June 2021, the Minor Planet Center (MPC) accounts for 536,190 unnumbered minor planets which represent 49% of the overall minor planet population. Unnumbered minor planets can be further divided into 109,140 single-opposition objects with short observation arcs, prone to mismatch and loss, and 427,050 objects that have been observed multiple times during opposition, when astrometric conditions are most favorable. The JPL Small-Body Da

List of unnumbered minor planets

The following is a list of unnumbered minor planets in chronological order of their principal provisional designation. Contrary to their numbered counterparts, unnumbered minor planets have a poorly determined orbit due to insufficient observational data. This also includes lost minor planets which have not been observed for many years, or even decades. As of June 2021, the Minor Planet Center (MPC) accounts for 536,190 unnumbered minor planets which represent 49% of the overall minor planet population. Unnumbered minor planets can be further divided into 109,140 single-opposition objects with short observation arcs, prone to mismatch and loss, and 427,050 objects that have been observed multiple times during opposition, when astrometric conditions are most favorable. The JPL Small-Body Da