(7811) Zhaojiuzhang Main-belt Asteroid
Discovered on 23 February 1982 by Purple Mountain Observatory at Xinglong.
Chinese physicist Zhao Jiuzhang (1907-1968) specialized in geophysics and space physics. A founder of dynamical meteorology in China, he was one of the most important pioneers of Chinese satellite programs, and he proposed the establishment of a new institute dedicated to space research.Naming citation (20070601/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Zhaojiuzhang is today
Seen from above the solar system on 2026-10-14: Zhaojiuzhang is 2.65 au from the Sun and 3.53 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 7811 |
| Provisional designation | 1982 DT6 |
| Orbit class | Main-belt Asteroid |
| Diameter | 7.27 km (#7,348 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.254 |
| Rotation period | 3.35 hours |
| Absolute magnitude (H) | 13.32 |
| Orbital period | 4.38 years |
| Semi-major axis | 2.68 au |
| Perihelion – aphelion | 2.40 – 2.95 au |
| Eccentricity | 0.103 |
| Inclination | 13.6° |
| Closest distance between its orbit and Earth's (MOID) | 1.42 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.