(17921) Aldeobaldia Main-belt Asteroid
Discovered on 15 April 1999 by LINEAR at Socorro.
Anna Lisa De Obaldia (b. 1985) was awarded third place in the 2003 Intel International Science and Engineering Fair for her microbiology project. She also received the Intel Foundation Achievement Award. She attends the Moorestown High School, Moorestown, New Jersey, U.S.A.Naming citation (20040614/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Aldeobaldia is today
Seen from above the solar system on 2026-10-14: Aldeobaldia is 2.33 au from the Sun and 2.60 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 17921 |
| Provisional designation | 1999 GC13 |
| Orbit class | Main-belt Asteroid |
| Rotation period | 209 hours |
| Absolute magnitude (H) | 14.68 |
| Orbital period | 3.55 years |
| Semi-major axis | 2.33 au |
| Perihelion – aphelion | 2.18 – 2.47 au |
| Eccentricity | 0.0633 |
| Inclination | 7.59° |
| Closest distance between its orbit and Earth's (MOID) | 1.19 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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All asteroids named after someone called Anna
Also discovered on 15 April 1999
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