(2258) Viipuri Main-belt Asteroid
Discovered on 7 October 1939 by Y. Vaisala at Turku.
Where Viipuri is today
Seen from above the solar system on 2026-10-14: Viipuri is 2.88 au from the Sun and 3.28 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 2258 |
| Provisional designation | 1939 TA |
| Orbit class | Main-belt Asteroid |
| Diameter | 26.3 km (#1,601 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0490 |
| Rotation period | 3.83 hours |
| Spectral type | C |
| Absolute magnitude (H) | 12.02 |
| Orbital period | 4.42 years |
| Semi-major axis | 2.69 au |
| Perihelion – aphelion | 2.48 – 2.91 au |
| Eccentricity | 0.0783 |
| Inclination | 1.48° |
| Closest distance between its orbit and Earth's (MOID) | 1.50 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.