(542) Susanna Main-belt Asteroid
Discovered on 15 August 1904 by Gotz, P., Kopff, A. at Heidelberg.
Where Susanna is today
Seen from above the solar system on 2026-10-14: Susanna is 3.25 au from the Sun and 4.19 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 542 |
| Provisional designation | A904 QA |
| Orbit class | Main-belt Asteroid |
| Diameter | 42.1 km (#919 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.217 |
| Rotation period | 10.1 hours |
| Spectral type | S |
| Absolute magnitude (H) | 9.37 |
| Orbital period | 4.95 years |
| Semi-major axis | 2.90 au |
| Perihelion – aphelion | 2.49 – 3.32 au |
| Eccentricity | 0.144 |
| Inclination | 12.1° |
| Closest distance between its orbit and Earth's (MOID) | 1.49 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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