(11873) Kokuseibi Main-belt Asteroid
Discovered on 30 November 1989 by Matsuyama, M., Watanabe, K. at Kushiro.
“Kokuseibi” is another name for The National Museum of Western Art. It opened in 1959 to introduce Western arts to the Japanese public. The core of the collection was the Matsukata Collection of Impressionist-school paintings and Rodin sculptures.Naming citation (20111210/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Kokuseibi is today
Seen from above the solar system on 2026-10-14: Kokuseibi is 2.04 au from the Sun and 1.08 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 11873 |
| Provisional designation | 1989 WS2 |
| Orbit class | Main-belt Asteroid |
| Rotation period | 4.77 hours |
| Absolute magnitude (H) | 13.86 |
| Orbital period | 3.39 years |
| Semi-major axis | 2.25 au |
| Perihelion – aphelion | 1.95 – 2.56 au |
| Eccentricity | 0.135 |
| Inclination | 7.40° |
| Closest distance between its orbit and Earth's (MOID) | 0.970 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.