(20571) Tiamorrison Main-belt Asteroid
Discovered on 9 September 1999 by LINEAR at Socorro.
Tiana Morrison mentored a finalist in the 2004 Discovery Channel Youth Science Challenge (DCYSC), a middle school science competition. She teaches at the Dunbar Middle School, Fort Worth, Texas.Naming citation (20041028/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Tiamorrison is today
Seen from above the solar system on 2026-10-14: Tiamorrison is 2.36 au from the Sun and 1.42 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 20571 |
| Provisional designation | 1999 RA135 |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.07 km (#15,038 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.225 |
| Rotation period | 450 hours |
| Absolute magnitude (H) | 14.92 |
| Orbital period | 3.35 years |
| Semi-major axis | 2.24 au |
| Perihelion – aphelion | 2.01 – 2.47 au |
| Eccentricity | 0.102 |
| Inclination | 2.11° |
| Closest distance between its orbit and Earth's (MOID) | 1.000 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 9 September 1999
- (12127) Mamiya
- (12130) Mousa
- (12589) Davidanand
- (12590) Ballantine
- (12591) Bergey
- (12592) Brianchen
- (12593) Shashlov
- (12594) Sidorclare
- (12595) Amandashaw
- (12596) Shukla
- (12597) Williamdaniel
- (12598) Sierra