(1521) Seinajoki Main-belt Asteroid
Discovered on 22 October 1938 by Y. Vaisala at Turku.
Where Seinajoki is today
Seen from above the solar system on 2026-10-14: Seinajoki is 2.86 au from the Sun and 3.70 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 1521 |
| Provisional designation | 1938 UB1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 14.8 km (#3,185 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.205 |
| Rotation period | 4.32 hours |
| Absolute magnitude (H) | 11.99 |
| Orbital period | 4.81 years |
| Semi-major axis | 2.85 au |
| Perihelion – aphelion | 2.45 – 3.25 au |
| Eccentricity | 0.141 |
| Inclination | 15.0° |
| Closest distance between its orbit and Earth's (MOID) | 1.49 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 22 October 1938
More named asteroids discovered by Y. Vaisala
- (1391) Carelia
- (1398) Donnera
- (1405) Sibelius
- (1406) Komppa
- (1407) Lindelof
- (1421) Esperanto
- (1424) Sundmania
- (1446) Sillanpaa
- (1447) Utra
- (1448) Lindbladia
- (1449) Virtanen
- (1450) Raimonda
← (1520) Imatra · (1522) Kokkola →