(135) Hertha Main-belt Asteroid
Discovered on 18 February 1874 by C. H. F. Peters at Clinton.
Where Hertha is today
Seen from above the solar system on 2026-10-14: Hertha is 2.03 au from the Sun and 2.47 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 135 |
| Provisional designation | A874 DA |
| Orbit class | Main-belt Asteroid |
| Diameter | 79.2 km (#386 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.144 |
| Rotation period | 8.40 hours |
| Spectral type | M |
| Absolute magnitude (H) | 8.31 |
| Orbital period | 3.78 years |
| Semi-major axis | 2.43 au |
| Perihelion – aphelion | 1.92 – 2.93 au |
| Eccentricity | 0.208 |
| Inclination | 2.30° |
| Closest distance between its orbit and Earth's (MOID) | 0.909 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.