(21936) Ryan Main-belt Asteroid
Discovered on 4 November 1999 by LINEAR at Socorro.
Colleen Marie Ryan (b. 1993) is a finalist in the 2005 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition, for her environmental sciences project. She attends the Bishop Flaget School, Chillicothe, Ohio.Naming citation (20051019/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
👶 Ryan as a baby name🐶 Ryan as a dog name
Where Ryan is today
Seen from above the solar system on 2026-10-14: Ryan is 2.37 au from the Sun and 1.39 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21936 |
| Provisional designation | 1999 VH79 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 15.63 |
| Orbital period | 3.38 years |
| Semi-major axis | 2.25 au |
| Perihelion – aphelion | 2.03 – 2.48 au |
| Eccentricity | 0.101 |
| Inclination | 2.06° |
| Closest distance between its orbit and Earth's (MOID) | 1.01 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Colleen
All asteroids named after someone called Colleen
Also discovered on 4 November 1999
- (13434) Adamquade
- (13435) Rohret
- (13825) Booth
- (16102) Barshannon
- (20686) Thottumkara
- (20687) Saletore
- (20688) Sandroricardo
- (20689) Zhuyuanchen
- (20690) Crivello
- (21924) Alyssaovaitt
- (21925) Supasternak
- (21926) Jacobperry