(21990) Garretyazzie Main-belt Asteroid
Discovered on 6 December 1999 by LINEAR at Socorro.
Garrett Michael Yazzie (b. 1991) is a finalist in the 2005 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition, for his engineering project. He attends the Pinon Unified School District #4 Middle School, Pinon, Arizona.Naming citation (20051019/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Garretyazzie is today
Seen from above the solar system on 2026-10-14: Garretyazzie is 3.20 au from the Sun and 4.14 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21990 |
| Provisional designation | 1999 XH22 |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.77 km (#11,065 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.234 |
| Absolute magnitude (H) | 14.15 |
| Orbital period | 4.98 years |
| Semi-major axis | 2.92 au |
| Perihelion – aphelion | 2.61 – 3.22 au |
| Eccentricity | 0.105 |
| Inclination | 2.57° |
| Closest distance between its orbit and Earth's (MOID) | 1.60 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 6 December 1999
- (13840) Wayneanderson
- (13841) Blankenship
- (13843) Cowenbrown
- (14224) Gaede
- (14678) Pinney
- (16113) Ahmed
- (16114) Alyono
- (16116) Balakrishnan
- (16117) Herbst
- (16142) Leung
- (20713) Sheward
- (21991) Zane
More named asteroids discovered by LINEAR
- (7904) Morrow
- (8744) Cilla
- (8745) Delaney
- (8954) Baral
- (9126) Samcoulson
- (9243) Alag
- (9454) Ardeishar
- (9458) Beaumont
- (9459) Gracecai
- (9461) Cotingkeh
- (9463) Criscione
- (9465) Fergusonsam
← (21989) Werntz · (21991) Zane →