(228158) Mamankei Main-belt Asteroid
Discovered on 19 September 2009 by PMO NEO Survey Program at XuYi.
Ma Mankei (1919-2014) was a Chinese educator and benefactor who devoted his life and finances to running schools and hospitals. He also made contributions to the development of Chinese education and medical treatment in Macao.Naming citation (MPC batch dated 2019-12-12), IAU / Minor Planet Center, via NASA/JPL
Where Mamankei is today
Seen from above the solar system on 2026-10-14: Mamankei is 3.09 au from the Sun and 2.10 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 228158 |
| Provisional designation | 2009 SZ96 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 14.94 |
| Orbital period | 5.57 years |
| Semi-major axis | 3.14 au |
| Perihelion – aphelion | 3.08 – 3.20 au |
| Eccentricity | 0.0201 |
| Inclination | 18.2° |
| Closest distance between its orbit and Earth's (MOID) | 2.09 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.