(9670) Magni Main-belt Asteroid
Discovered on 10 July 1997 by A. Boattini at Campo Imperatore.
Named in honor of Gianfranco Magni (b. 1943), who joined the Istituto di Astrofisica Spaziale in Rome in 1975. He has worked on the physics of stellar interiors, in particular on the equation of the state of gas at high pressure and temperature. Currently, his main field of interest is the origin of the solar system and of planetary systems in general, with special attention to the structure and evolution of circumstellar disks and the formation of giant planets. Involved also in the study of the origin and structure of comets, he is a team member of the cometary mission Rosetta. A lover of early music, he plays the recorder and belongs to two musical groups, “L'Amoroso Cantar” (Medieval music) and “Il Martellato” (Renaissance music).Naming citation (19990402/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Magni is today
Seen from above the solar system on 2026-10-14: Magni is 2.88 au from the Sun and 3.86 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 9670 |
| Provisional designation | 1997 NJ10 |
| Orbit class | Main-belt Asteroid |
| Diameter | 12.6 km (#3,877 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0810 |
| Absolute magnitude (H) | 12.61 |
| Orbital period | 5.17 years |
| Semi-major axis | 2.99 au |
| Perihelion – aphelion | 2.85 – 3.13 au |
| Eccentricity | 0.0471 |
| Inclination | 10.3° |
| Closest distance between its orbit and Earth's (MOID) | 1.86 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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