(20) Massalia Main-belt Asteroid
Discovered on 19 September 1852 by A. de Gasparis at Naples.
Where Massalia is today
Seen from above the solar system on 2026-10-14: Massalia is 2.60 au from the Sun and 3.48 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 20 |
| Provisional designation | A852 SA |
| Orbit class | Main-belt Asteroid |
| Diameter | 136 km (#112 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.241 |
| Rotation period | 8.10 hours |
| Spectral type | S |
| Absolute magnitude (H) | 6.54 |
| Orbital period | 3.74 years |
| Semi-major axis | 2.41 au |
| Perihelion – aphelion | 2.06 – 2.75 au |
| Eccentricity | 0.144 |
| Inclination | 0.709° |
| Closest distance between its orbit and Earth's (MOID) | 1.08 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
More named asteroids discovered by A. de Gasparis
← (19) Fortuna · (21) Lutetia →