(15385) Dallolmo Main-belt Asteroid
Discovered on 25 September 1997 by Osservatorio San Vittore at Bologna.
With degrees in both law and physics, Umberto Dall'Olmo (1925-1980) was an amateur astronomer who principally observed Jupiter and studied flare stars with Rosino. He was also interested in the history of astronomy and worked as a technician at the University of Bologna's Institute of Astronomy.Naming citation (20010309/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Dallolmo is today
Seen from above the solar system on 2026-10-14: Dallolmo is 3.19 au from the Sun and 3.75 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 15385 |
| Provisional designation | 1997 SP4 |
| Orbit class | Main-belt Asteroid |
| Diameter | 5.17 km (#10,303 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.240 |
| Rotation period | 4.68 hours |
| Absolute magnitude (H) | 14.21 |
| Orbital period | 5.10 years |
| Semi-major axis | 2.96 au |
| Perihelion – aphelion | 2.74 – 3.19 au |
| Eccentricity | 0.0769 |
| Inclination | 11.7° |
| Closest distance between its orbit and Earth's (MOID) | 1.76 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Umberto
- (5728) Umbertobenvenuti
- (10219) Penco
- (10605) Guidoni
- (13069) Umbertoeco
- (25602) Ucaronia
- (37749) Umbertobonori
- (79991) Umbertoleotti
- (135910) Umbertorepetti
All asteroids named after someone called Umberto
Also discovered on 25 September 1997
- (15386) Nicolini
- (16802) Rainer
- (26971) Sezimovo Usti
- (27963) Hartkopf
- (29457) Marcopolo
- (31139) Garnavich
- (35356) Vondrak
- (37788) Suchan
- (44005) Migliardi