(9177) Donsaari Main-belt Asteroid
Discovered on 18 December 1990 by E. F. Helin at Palomar.
Donald Gene Saari (b. 1940) is an American mathematician who has worked at the University of California, Irvine, and at Northwestern University. Don has made fundamental contributions to the n-body problem of celestial mechanics, voting theory, and the application of mathematics to the social sciences.Naming citation (MPC batch dated 2020-02-05), IAU / Minor Planet Center, via NASA/JPL
Where Donsaari is today
Seen from above the solar system on 2026-10-14: Donsaari is 2.65 au from the Sun and 3.02 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 9177 |
| Provisional designation | 1990 YA |
| Orbit class | Main-belt Asteroid |
| Diameter | 5.57 km (#9,610 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.206 |
| Absolute magnitude (H) | 13.81 |
| Orbital period | 4.10 years |
| Semi-major axis | 2.56 au |
| Perihelion – aphelion | 1.85 – 3.27 au |
| Eccentricity | 0.279 |
| Inclination | 4.43° |
| Closest distance between its orbit and Earth's (MOID) | 0.855 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Donald
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- (4794) Bogard
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- (6688) Donmccarthy
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- (9122) Hunten
- (9295) Donaldyoung
- (9448) Donaldavies
- (11267) Donaldkessler
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- (12410) Donald Duck
All asteroids named after someone called Donald