(6221) Ducentesima Main-belt Asteroid
Discovered on 13 April 1980 by A. Mrkos at Klet.
The naming commemorates the 200th Klet numbered minor planet. Its Latin name was inspired by classical female names from the pioneer days of the searching for minor planets in the nineteenth century. Name suggested by J. Ticha.Naming citation (19960828/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Ducentesima is today
Seen from above the solar system on 2026-10-14: Ducentesima is 3.03 au from the Sun and 3.23 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 6221 |
| Provisional designation | 1980 GO |
| Orbit class | Main-belt Asteroid |
| Diameter | 13.2 km (#3,654 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0640 |
| Rotation period | 13.8 hours |
| Absolute magnitude (H) | 13.07 |
| Orbital period | 5.64 years |
| Semi-major axis | 3.17 au |
| Perihelion – aphelion | 2.82 – 3.52 au |
| Eccentricity | 0.109 |
| Inclination | 1.81° |
| Closest distance between its orbit and Earth's (MOID) | 1.82 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.