(10689) Pinillaalonso Outer Main-belt Asteroid
Discovered on 28 February 1981 by S. J. Bus at Siding Spring.
Noemi Pinilla-Alonso (b. 1971) is a planetary scientist at the Florida Space Institute and an expert in the study of surface compositions of minor solar system bodies using observational techniques and modeling.Naming citation (MPC batch dated 2017-03-12), IAU / Minor Planet Center, via NASA/JPL
Where Pinillaalonso is today
Seen from above the solar system on 2026-10-14: Pinillaalonso is 2.97 au from the Sun and 3.61 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 10689 |
| Provisional designation | 1981 DZ1 |
| Orbit class | Outer Main-belt Asteroid |
| Diameter | 12.7 km (#3,844 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0830 |
| Absolute magnitude (H) | 13.29 |
| Orbital period | 5.77 years |
| Semi-major axis | 3.22 au |
| Perihelion – aphelion | 2.97 – 3.46 au |
| Eccentricity | 0.0757 |
| Inclination | 22.0° |
| Closest distance between its orbit and Earth's (MOID) | 2.04 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 28 February 1981
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- (2958) Arpetito
- (3287) Olmstead
- (3307) Athabasca
- (3602) Lazzaro
- (3805) Goldreich
- (4052) Crovisier
- (4192) Breysacher
- (4473) Sears
- (4523) MIT
- (4989) Joegoldstein
- (5046) Carletonmoore