(21723) Yinyinwu Main-belt Asteroid
Discovered on 9 September 1999 by LINEAR at Socorro.
Yin Yin Wu (b. 1989) was awarded second place in the 2006 Intel International Science and Engineering Fair for her chemistry project. She attends the J.M. Atherton High School, Louisville, Kentucky, U.S.A.Naming citation (20060711/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Yinyinwu is today
Seen from above the solar system on 2026-10-14: Yinyinwu is 2.19 au from the Sun and 2.55 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21723 |
| Provisional designation | 1999 RT128 |
| Orbit class | Main-belt Asteroid |
| Diameter | 8.16 km (#6,424 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0730 |
| Rotation period | 298 hours |
| Absolute magnitude (H) | 14.36 |
| Orbital period | 4.58 years |
| Semi-major axis | 2.76 au |
| Perihelion – aphelion | 1.99 – 3.53 au |
| Eccentricity | 0.278 |
| Inclination | 6.96° |
| Closest distance between its orbit and Earth's (MOID) | 0.983 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
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
← (21722) Rambhia · (21724) Ratai →