(1558) Jarnefelt Outer Main-belt Asteroid
Discovered on 20 January 1942 by L. Oterma at Turku.
Where Jarnefelt is today
Seen from above the solar system on 2026-10-14: Jarnefelt is 3.18 au from the Sun and 2.39 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 1558 |
| Provisional designation | 1942 BD |
| Orbit class | Outer Main-belt Asteroid |
| Diameter | 55.0 km (#654 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0490 |
| Rotation period | 6.26 hours |
| Absolute magnitude (H) | 10.46 |
| Orbital period | 5.79 years |
| Semi-major axis | 3.22 au |
| Perihelion – aphelion | 3.13 – 3.31 au |
| Eccentricity | 0.0278 |
| Inclination | 10.5° |
| Closest distance between its orbit and Earth's (MOID) | 2.16 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.