(20490) Longobardo Main-belt Asteroid
Discovered on 22 July 1999 by LINEAR at Socorro.
Andrea Longobardo (b. 1984) is an Italian planetary scientist at the Istituto Nazionale di Astrofisica. He is an expert on small-body photometry, cometary dust, surface spectroscopy and dust-sensor development. Andrea is a member of the Dawn, Rosetta, Hayabusa 2, Hera, Comet Interceptor and Tianwen-2 missions.Naming citation (WGSBN Bull. 6, #11, 23), IAU / Minor Planet Center, via NASA/JPL
Where Longobardo is today
Seen from above the solar system on 2026-10-14: Longobardo is 2.85 au from the Sun and 3.78 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 20490 |
| Provisional designation | 1999 OW2 |
| Orbit class | Main-belt Asteroid |
| Diameter | 7.78 km (#6,796 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.288 |
| Absolute magnitude (H) | 12.99 |
| Orbital period | 4.23 years |
| Semi-major axis | 2.61 au |
| Perihelion – aphelion | 2.21 – 3.02 au |
| Eccentricity | 0.154 |
| Inclination | 21.2° |
| Closest distance between its orbit and Earth's (MOID) | 1.33 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Andrea
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- (26575) Andreapugh
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All asteroids named after someone called Andrea