(20197) Enriques Main-belt Asteroid
Discovered on 14 February 1997 by P. G. Comba at Prescott.
Federigo Enriques (1871-1946), professor at the universities of Bologna and Rome, made major contributions to the theory of algebraic surfaces and wrote widely on the history and philosophy of science. He received numerous awards, including an honorary doctorate from the University of St. Andrews.Naming citation (20010509/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Enriques is today
Seen from above the solar system on 2026-10-14: Enriques is 2.72 au from the Sun and 1.76 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 20197 |
| Provisional designation | 1997 CK22 |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.34 km (#14,374 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.302 |
| Rotation period | 48.1 hours |
| Absolute magnitude (H) | 14.1 |
| Orbital period | 4.42 years |
| Semi-major axis | 2.69 au |
| Perihelion – aphelion | 2.39 – 3.00 au |
| Eccentricity | 0.114 |
| Inclination | 13.7° |
| Closest distance between its orbit and Earth's (MOID) | 1.41 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.