(20433) Prestinenza Main-belt Asteroid
Discovered on 14 February 1999 by G. Masi at Ceccano.
Luigi Prestinenza (b. 1929) is a very active, appreciated and popular Italian amateur astronomer. A journalist by profession, he did impressive work to keep fresh the memory of important observers of the past like Cerulli, Schiaparelli and Maggini. He is president of the “G. Ruggeri” astronomical group in Catania, Sicily.Naming citation (20010309/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Prestinenza is today
Seen from above the solar system on 2026-10-14: Prestinenza is 3.33 au from the Sun and 3.87 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 20433 |
| Provisional designation | 1999 CL12 |
| Orbit class | Main-belt Asteroid |
| Diameter | 11.3 km (#4,386 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0550 |
| Absolute magnitude (H) | 13.54 |
| Orbital period | 5.59 years |
| Semi-major axis | 3.15 au |
| Perihelion – aphelion | 2.86 – 3.44 au |
| Eccentricity | 0.0915 |
| Inclination | 17.1° |
| Closest distance between its orbit and Earth's (MOID) | 1.87 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Luigi
- (7006) Folco
- (10184) Galvani
- (10413) Pansecchi
- (12369) Pirandello
- (12384) Luigimartella
- (14947) Luigibussolino
- (18542) Broglio
- (27988) Menabrea
- (32931) Ferioli
- (32944) Gussalli
- (37640) Luiginegrelli
- (39653) Carnera
All asteroids named after someone called Luigi
Also discovered on 14 February 1999
- (27217) Mattieharrington
- (28331) Dianeberard
- (31450) Stevepreston
- (31453) Arnaudthiry
- (42795) Derekmuller
- (49500) Ishitoshi
- (59248) Genevievesoucail