(33) Polyhymnia Main-belt Asteroid
Discovered on 28 October 1854 by J. Chacornac at Paris.
Where Polyhymnia is today
Seen from above the solar system on 2026-10-14: Polyhymnia is 3.83 au from the Sun and 4.66 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 33 |
| Provisional designation | A854 UB |
| Orbit class | Main-belt Asteroid |
| Diameter | 52.9 km (#693 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.240 |
| Rotation period | 18.6 hours |
| Spectral type | S |
| Absolute magnitude (H) | 8.46 |
| Orbital period | 4.87 years |
| Semi-major axis | 2.87 au |
| Perihelion – aphelion | 1.91 – 3.83 au |
| Eccentricity | 0.334 |
| Inclination | 1.85° |
| Closest distance between its orbit and Earth's (MOID) | 0.903 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
More named asteroids discovered by J. Chacornac
← (32) Pomona · (34) Circe →