(22890) Ruthaellis Main-belt Asteroid
Discovered on 29 September 1999 by LINEAR at Socorro.
Rutha Ellis mentored a finalist in the 2006 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition. She teaches at the Lincoln Middle School, Bradenton, Florida.Naming citation (20061009/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Ruthaellis is today
Seen from above the solar system on 2026-10-14: Ruthaellis is 1.87 au from the Sun and 1.79 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 22890 |
| Provisional designation | 1999 SF8 |
| Orbit class | Main-belt Asteroid |
| Diameter | 2.67 km (#15,929 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.283 |
| Absolute magnitude (H) | 14.88 |
| Orbital period | 3.41 years |
| Semi-major axis | 2.27 au |
| Perihelion – aphelion | 1.87 – 2.66 au |
| Eccentricity | 0.175 |
| Inclination | 7.10° |
| Closest distance between its orbit and Earth's (MOID) | 0.869 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 29 September 1999
- (19701) Aomori
- (20617) Richardgreenwood
- (20618) Daniebutler
- (21789) Frankwasser
- (21791) Mattweegman
- (21795) Masi
- (22889) Donnablaney
- (33789) Sharmacam
- (121328) Devlynrfennell
- (121330) Colbygoodloe
- (121332) Jasonhair
- (129879) Tishasaltzman