(11637) Yangjiachi Main-belt Asteroid
Discovered on 24 December 1996 by Beijing Schmidt CCD Asteroid Program at Xinglong.
Jiachi Yang (b. 1919), an expert in automatic control and space technology, devoted himself to the development of artificial earth satellites in China. He is a member of the Chinese Academy of Sciences and of the International Academy of Astronautics, and he received several highest scientific achievement prizes in China.Naming citation (20010804/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Yangjiachi is today
Seen from above the solar system on 2026-10-14: Yangjiachi is 3.28 au from the Sun and 3.74 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 11637 |
| Provisional designation | 1996 YJ2 |
| Orbit class | Main-belt Asteroid |
| Diameter | 5.95 km (#9,006 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.262 |
| Rotation period | 5.93 hours |
| Absolute magnitude (H) | 13.45 |
| Orbital period | 4.65 years |
| Semi-major axis | 2.79 au |
| Perihelion – aphelion | 2.26 – 3.31 au |
| Eccentricity | 0.189 |
| Inclination | 10.8° |
| Closest distance between its orbit and Earth's (MOID) | 1.28 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.