(33973) Xiyunhou Main-belt Asteroid
Discovered on 5 July 2000 by LONEOS at Anderson Mesa.
Xiyun Hou (b. 1981) is a Chinese dynamical astronomer. He developed a novel approach to computing the mutual potential between arbitrary bodies, resulting in a fast algorithm for computing the gravitational torques and forces between binary asteroid components. This tool has enabled the realistic and comprehensive study of binary asteroid dynamics.Naming citation (WGSBN Bull. 4, #1, 6), IAU / Minor Planet Center, via NASA/JPL
Where Xiyunhou is today
Seen from above the solar system on 2026-10-14: Xiyunhou is 3.27 au from the Sun and 4.26 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 33973 |
| Provisional designation | 2000 NS16 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 14.2 |
| Orbital period | 4.65 years |
| Semi-major axis | 2.79 au |
| Perihelion – aphelion | 2.30 – 3.27 au |
| Eccentricity | 0.175 |
| Inclination | 10.1° |
| Closest distance between its orbit and Earth's (MOID) | 1.33 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 5 July 2000
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