(2020) Ukko Main-belt Asteroid
Discovered on 18 March 1936 by Y. Vaisala at Turku.
Named for the supreme god in Finnish folklore. Ukko means “old man”; ukkonen means “thunder”.Naming citation (MPC 5450), IAU / Minor Planet Center, via NASA/JPL
Where Ukko is today
Seen from above the solar system on 2026-10-14: Ukko is 3.17 au from the Sun and 3.74 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 2020 |
| Provisional designation | 1936 FR |
| Orbit class | Main-belt Asteroid |
| Diameter | 18.7 km (#2,386 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.140 |
| Rotation period | 25.5 hours |
| Absolute magnitude (H) | 11.43 |
| Orbital period | 5.26 years |
| Semi-major axis | 3.02 au |
| Perihelion – aphelion | 2.84 – 3.21 au |
| Eccentricity | 0.0624 |
| Inclination | 11.1° |
| Closest distance between its orbit and Earth's (MOID) | 1.86 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.