(3897) Louhi Main-belt Asteroid
Discovered on 8 September 1942 by Y. Vaisala at Turku.
Where Louhi is today
Seen from above the solar system on 2026-10-14: Louhi is 2.28 au from the Sun and 1.44 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 3897 |
| Provisional designation | 1942 RT |
| Orbit class | Main-belt Asteroid |
| Diameter | 10.8 km (#4,695 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.127 |
| Rotation period | 25.9 hours |
| Absolute magnitude (H) | 13.15 |
| Orbital period | 4.42 years |
| Semi-major axis | 2.69 au |
| Perihelion – aphelion | 2.27 – 3.12 au |
| Eccentricity | 0.158 |
| Inclination | 7.10° |
| Closest distance between its orbit and Earth's (MOID) | 1.26 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.