(3678) Mongmanwai Main-belt Asteroid
Discovered on 20 January 1966 by Purple Mountain Observatory at Nanking.
Where Mongmanwai is today
Seen from above the solar system on 2026-10-14: Mongmanwai is 2.67 au from the Sun and 2.32 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 3678 |
| Provisional designation | 1966 BO |
| Orbit class | Main-belt Asteroid |
| Diameter | 7.97 km (#6,609 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.253 |
| Rotation period | 4.18 hours |
| Spectral type | S |
| Absolute magnitude (H) | 12.84 |
| Orbital period | 4.07 years |
| Semi-major axis | 2.55 au |
| Perihelion – aphelion | 2.06 – 3.04 au |
| Eccentricity | 0.191 |
| Inclination | 8.29° |
| Closest distance between its orbit and Earth's (MOID) | 1.08 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.