(9947) Takaishuji Main-belt Asteroid
Discovered on 17 August 1990 by E. F. Helin at Palomar.
An elementary school teacher, Shuji Takai (b. 1967) is a member of the Kuroishi Subaru Association. He is a well-known lecturer at the children's astronomy club founded by Kuroishi city. Name suggested by Y. Yamada.Naming citation (20120406/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Takaishuji is today
Seen from above the solar system on 2026-10-14: Takaishuji is 1.78 au from the Sun and 1.21 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 9947 |
| Provisional designation | 1990 QB |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.38 km (#14,275 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.312 |
| Absolute magnitude (H) | 14.32 |
| Orbital period | 3.56 years |
| Semi-major axis | 2.33 au |
| Perihelion – aphelion | 1.74 – 2.92 au |
| Eccentricity | 0.253 |
| Inclination | 21.8° |
| Closest distance between its orbit and Earth's (MOID) | 0.817 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Shuji
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