(1557) Roehla Main-belt Asteroid
Discovered on 14 January 1942 by K. Reinmuth at Heidelberg.
Where Roehla is today
Seen from above the solar system on 2026-10-14: Roehla is 3.33 au from the Sun and 4.31 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 1557 |
| Provisional designation | 1942 AD |
| Orbit class | Main-belt Asteroid |
| Diameter | 18.8 km (#2,383 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.151 |
| Rotation period | 5.68 hours |
| Absolute magnitude (H) | 11.46 |
| Orbital period | 5.22 years |
| Semi-major axis | 3.01 au |
| Perihelion – aphelion | 2.68 – 3.34 au |
| Eccentricity | 0.109 |
| Inclination | 10.3° |
| Closest distance between its orbit and Earth's (MOID) | 1.68 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.