(21770) Wangyiran Main-belt Asteroid
Discovered on 8 September 1999 by LINEAR at Socorro.
Wang YiRan (b. 1986) was awarded second place in the 2005 Intel International Science and Engineering Fair for his physics project. He attends the High School Affiliated to Renmin University of China, Beijing, China.Naming citation (20050822/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Wangyiran is today
Seen from above the solar system on 2026-10-14: Wangyiran is 2.47 au from the Sun and 3.45 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21770 |
| Provisional designation | 1999 RF211 |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.73 km (#13,385 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.242 |
| Rotation period | 7.86 hours |
| Absolute magnitude (H) | 14.54 |
| Orbital period | 3.61 years |
| Semi-major axis | 2.35 au |
| Perihelion – aphelion | 2.24 – 2.47 au |
| Eccentricity | 0.0489 |
| Inclination | 5.06° |
| Closest distance between its orbit and Earth's (MOID) | 1.24 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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