(2640) Hallstrom Main-belt Asteroid
Discovered on 18 March 1941 by L. Oterma at Turku.
Where Hallstrom is today
Seen from above the solar system on 2026-10-14: Hallstrom is 2.18 au from the Sun and 3.18 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 2640 |
| Provisional designation | 1941 FN |
| Orbit class | Main-belt Asteroid |
| Rotation period | 22.9 hours |
| Spectral type | V |
| Absolute magnitude (H) | 13.19 |
| Orbital period | 3.71 years |
| Semi-major axis | 2.40 au |
| Perihelion – aphelion | 2.18 – 2.61 au |
| Eccentricity | 0.0891 |
| Inclination | 6.66° |
| Closest distance between its orbit and Earth's (MOID) | 1.18 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.