(1909) Alekhin Main-belt Asteroid
Discovered on 4 September 1972 by L. V. Zhuravleva at Nauchnyj.
Where Alekhin is today
Seen from above the solar system on 2026-10-14: Alekhin is 2.94 au from the Sun and 2.39 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 1909 |
| Provisional designation | 1972 RW2 |
| Orbit class | Main-belt Asteroid |
| Diameter | 18.7 km (#2,395 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0600 |
| Rotation period | 149 hours |
| Absolute magnitude (H) | 12.89 |
| Orbital period | 3.77 years |
| Semi-major axis | 2.42 au |
| Perihelion – aphelion | 1.87 – 2.97 au |
| Eccentricity | 0.228 |
| Inclination | 1.80° |
| Closest distance between its orbit and Earth's (MOID) | 0.859 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.