(3509) Sanshui Main-belt Asteroid
Discovered on 28 October 1978 by Purple Mountain Observatory at Nanking.
Where Sanshui is today
Seen from above the solar system on 2026-10-14: Sanshui is 2.98 au from the Sun and 3.97 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 3509 |
| Provisional designation | 1978 UH2 |
| Orbit class | Main-belt Asteroid |
| Diameter | 9.32 km (#5,532 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.322 |
| Rotation period | 13.7 hours |
| Absolute magnitude (H) | 12.41 |
| Orbital period | 4.19 years |
| Semi-major axis | 2.60 au |
| Perihelion – aphelion | 2.20 – 3.00 au |
| Eccentricity | 0.153 |
| Inclination | 12.8° |
| Closest distance between its orbit and Earth's (MOID) | 1.21 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.