(1503) Kuopio Main-belt Asteroid
Discovered on 15 December 1938 by Y. Vaisala at Turku.
Where Kuopio is today
Seen from above the solar system on 2026-10-14: Kuopio is 2.87 au from the Sun and 2.28 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 1503 |
| Provisional designation | 1938 XD |
| Orbit class | Main-belt Asteroid |
| Diameter | 23.0 km (#1,859 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.399 |
| Rotation period | 9.96 hours |
| Absolute magnitude (H) | 10.63 |
| Orbital period | 4.26 years |
| Semi-major axis | 2.63 au |
| Perihelion – aphelion | 2.36 – 2.89 au |
| Eccentricity | 0.102 |
| Inclination | 12.3° |
| Closest distance between its orbit and Earth's (MOID) | 1.37 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.