(11440) Massironi Outer Main-belt Asteroid
Discovered on 30 September 1975 by S. J. Bus at Palomar.
Matteo Massironi (b. 1967) is a Professor at the University of Padova whose research includes the geology of (21) Lutetia and the surface layering of 67P/Churyumov-Gerasimenko using Rosetta spacecraft data.Naming citation (MPC batch dated 2017-03-12), IAU / Minor Planet Center, via NASA/JPL
Where Massironi is today
Seen from above the solar system on 2026-10-14: Massironi is 3.16 au from the Sun and 2.55 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 11440 |
| Provisional designation | 1975 SC2 |
| Orbit class | Outer Main-belt Asteroid |
| Diameter | 12.2 km (#3,997 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.142 |
| Rotation period | 5.78 hours |
| Absolute magnitude (H) | 12.78 |
| Orbital period | 6.28 years |
| Semi-major axis | 3.40 au |
| Perihelion – aphelion | 3.15 – 3.66 au |
| Eccentricity | 0.0753 |
| Inclination | 9.56° |
| Closest distance between its orbit and Earth's (MOID) | 2.18 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Matteo
All asteroids named after someone called Matteo
Also discovered on 30 September 1975
- (3296) Bosque Alegre
- (4517) Ralpharvey
- (5497) Sararussell
- (6216) San Jose
- (7807) Grier
- (7909) Ziffer
- (8129) Michaelbusch
- (8242) Joshemery
- (8243) Devonburr
- (9715) Paolotanga
- (12183) Caltonen
- (12184) Trevormerkley