(291633) Heyun Main-belt Asteroid
Discovered on 19 April 2006 by Ye, Q.-Z., Lin, H.-C. at Lulin.
He Yun (b. 1921) is a Chinese radio/TV engineer and the chief designer of the old Shanghai TV Tower. He is also a veteran amateur astronomer, who has been active in the greater Shanghai region for decades.Naming citation (MPC batch dated 2016-08-18), IAU / Minor Planet Center, via NASA/JPL
Where Heyun is today
Seen from above the solar system on 2026-10-14: Heyun is 3.55 au from the Sun and 3.80 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 291633 |
| Provisional designation | 2006 HY20 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 16.39 |
| Orbital period | 5.50 years |
| Semi-major axis | 3.12 au |
| Perihelion – aphelion | 2.66 – 3.57 au |
| Eccentricity | 0.146 |
| Inclination | 12.7° |
| Closest distance between its orbit and Earth's (MOID) | 1.68 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called He
All asteroids named after someone called He