(21721) Feiniqu Main-belt Asteroid
Discovered on 9 September 1999 by LINEAR at Socorro.
Feini Qu (b. 1987) was awarded first place in the 2005 Intel International Science and Engineering Fair for her engineering team project. She also received the Intel Foundation Achievement Award. She attends the Half Hollow Hills High School East, Dix Hills, New York, U.S.A.Naming citation (20050822/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Feiniqu is today
Seen from above the solar system on 2026-10-14: Feiniqu is 2.45 au from the Sun and 3.45 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21721 |
| Provisional designation | 1999 RY119 |
| Orbit class | Main-belt Asteroid |
| Diameter | 1.90 km (#17,150 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.489 |
| Absolute magnitude (H) | 15.34 |
| Orbital period | 3.52 years |
| Semi-major axis | 2.32 au |
| Perihelion – aphelion | 2.01 – 2.63 au |
| Eccentricity | 0.134 |
| Inclination | 7.11° |
| Closest distance between its orbit and Earth's (MOID) | 0.994 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