(4212) Sansyu-Asuke Main-belt Asteroid
Discovered on 28 September 1987 by Suzuki, K., Urata, T. at Toyota.
Sansyu-Asuke, in the middle of Aichi prefecture, has a national park where colors are beautiful in the autumn season.Naming citation (20041126/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Sansyu-Asuke is today
Seen from above the solar system on 2026-10-14: Sansyu-Asuke is 2.39 au from the Sun and 1.42 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 4212 |
| Provisional designation | 1987 SB2 |
| Orbit class | Main-belt Asteroid |
| Diameter | 16.9 km (#2,699 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.225 |
| Rotation period | 15.9 hours |
| Absolute magnitude (H) | 11.32 |
| Orbital period | 5.61 years |
| Semi-major axis | 3.16 au |
| Perihelion – aphelion | 2.39 – 3.93 au |
| Eccentricity | 0.244 |
| Inclination | 14.8° |
| Closest distance between its orbit and Earth's (MOID) | 1.39 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.