(3426) Seki Main-belt Asteroid
Discovered on 5 February 1932 by K. Reinmuth at Heidelberg.
Where Seki is today
Seen from above the solar system on 2026-10-14: Seki is 2.37 au from the Sun and 2.78 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 3426 |
| Provisional designation | 1932 CQ |
| Orbit class | Main-belt Asteroid |
| Diameter | 16.4 km (#2,815 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0500 |
| Rotation period | 18.0 hours |
| Absolute magnitude (H) | 12.99 |
| Orbital period | 4.24 years |
| Semi-major axis | 2.62 au |
| Perihelion – aphelion | 2.36 – 2.87 au |
| Eccentricity | 0.0978 |
| Inclination | 13.1° |
| Closest distance between its orbit and Earth's (MOID) | 1.39 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.