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Discovery and designation
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| Discovered by | Osservatorio San Vittore |
| Discovery site | Bologna |
| Discovery date | September 25, 1997 |
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Designations
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| MPC designation | 15385 |
| Alternate name(s) | 1997 SP4 |
| Epoch May 14, 2008 | |
| Ap | 3.1941169 |
| Peri | 2.7301881 |
| Eccentricity | 0.0783094 |
| Orbital period | 1862.1281362 |
| Mean anomaly | 305.78937 |
| Inclination | 11.73796 |
| Longitude of ascending node | 130.68535 |
| Argument of peri | 324.55770 |
| Absolute magnitude (H) | 13.6 |
15385 Dallolmo (1997 SP4) is a main-belt asteroid discovered on September 25, 1997 by Osservatorio San Vittore at Bologna.
It is named after Umberto Dall'Olmo (1925–1980), who was an amateur astronomer with degrees in both law and physics, 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.
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