(16543) Rosetta Main-belt Asteroid
Discovered on 5 September 1991 by E. W. Elst at Haute Provence.
In remembrance of the successful arrival of the Rosetta spacecraft at comet 67P/Churyumov-Gerasimenko.Naming citation (MPC batch dated 2015-01-05), IAU / Minor Planet Center, via NASA/JPL
👶 Rosetta as a baby name🐶 Rosetta as a dog name
Where Rosetta is today
Seen from above the solar system on 2026-10-14: Rosetta is 2.32 au from the Sun and 2.02 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 16543 |
| Provisional designation | 1991 RC2 |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.81 km (#13,195 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.296 |
| Absolute magnitude (H) | 14.36 |
| Orbital period | 3.53 years |
| Semi-major axis | 2.32 au |
| Perihelion – aphelion | 2.03 – 2.61 au |
| Eccentricity | 0.127 |
| Inclination | 7.38° |
| Closest distance between its orbit and Earth's (MOID) | 1.05 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.