(10946) Guyidong Main-belt Asteroid
Discovered on 16 April 1999 by Beijing Schmidt CCD Asteroid Program at Xinglong.
Gu Yidong (b. 1946) is an expert in space science and an Academician of the Chinese Academy of Sciences. He is a pioneer of high-altitude scientific balloons and has made outstanding contributions to the innovation and development of space science in China.Naming citation (WGSBN Bull. 6, #12, 6), IAU / Minor Planet Center, via NASA/JPL
Where Guyidong is today
Seen from above the solar system on 2026-10-14: Guyidong is 2.50 au from the Sun and 1.66 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 10946 |
| Provisional designation | 1999 HR2 |
| Orbit class | Main-belt Asteroid |
| Diameter | 16.1 km (#2,858 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0430 |
| Absolute magnitude (H) | 13.07 |
| Orbital period | 4.82 years |
| Semi-major axis | 2.85 au |
| Perihelion – aphelion | 2.23 – 3.48 au |
| Eccentricity | 0.218 |
| Inclination | 15.9° |
| Closest distance between its orbit and Earth's (MOID) | 1.30 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.