(4652) Iannini Main-belt Asteroid
Discovered on 30 August 1975 by Felix Aguilar Observatory at El Leoncito.
Named in honor of Gualberto Mario Iannini (b. 1917), Argentinean astronomer who has worked in the field of astrometry for almost 40 years. As a student, Iannini studied the orbit of C/1942 C1 (Whipple-Bernasconi-Kulin). In 1962 he joined the faculty of the School of Mathematics, Astronomy and Physics of the National University of Cordoba and became head of the Department of Astrometry of the Cordoba Observatory, where he finished the reduction of the meridian circle catalogue of the Southern Polar Cap, known as the Cordoba E catalogue.Naming citation (19990202/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Iannini is today
Seen from above the solar system on 2026-10-14: Iannini is 2.68 au from the Sun and 3.18 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 4652 |
| Provisional designation | 1975 QO |
| Orbit class | Main-belt Asteroid |
| Diameter | 6.28 km (#8,536 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.196 |
| Rotation period | 12.2 hours |
| Absolute magnitude (H) | 13.43 |
| Orbital period | 4.30 years |
| Semi-major axis | 2.64 au |
| Perihelion – aphelion | 1.81 – 3.47 au |
| Eccentricity | 0.314 |
| Inclination | 11.0° |
| Closest distance between its orbit and Earth's (MOID) | 0.835 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.