(509761) Umberto Main-belt Asteroid
Discovered on 19 October 2008 by Farra d'Isonzo at Farra d'Isonzo.
Umberto Martissa (b. 1935) is an Italian mathematics high-school professor. For many years he has been President of the Circolo Culturale Astronomico di Farra d'Isonzo.Naming citation (WGSBN Bull. 2, #6, 6), IAU / Minor Planet Center, via NASA/JPL
Where Umberto is today
Seen from above the solar system on 2026-10-14: Umberto is 2.26 au from the Sun and 2.26 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 509761 |
| Provisional designation | 2008 UM |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 17.11 |
| Orbital period | 4.33 years |
| Semi-major axis | 2.66 au |
| Perihelion – aphelion | 2.06 – 3.25 au |
| Eccentricity | 0.224 |
| Inclination | 13.5° |
| Closest distance between its orbit and Earth's (MOID) | 1.10 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.