(22940) Chyan Main-belt Asteroid
Discovered on 10 October 1999 by LINEAR at Socorro.
Yieu Chyan (b. 1989) is a finalist in the 2007 Intel Science Talent Search (STS), a science competition for high school seniors, for his chemistry project. He attends the Texas Academy of Mathematics & Science, Denton, Texas.Naming citation (20070303/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Chyan is today
Seen from above the solar system on 2026-10-14: Chyan is 2.66 au from the Sun and 3.13 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 22940 |
| Provisional designation | 1999 TF178 |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.27 km (#12,116 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0810 |
| Rotation period | 43.1 hours |
| Absolute magnitude (H) | 15.61 |
| Orbital period | 3.68 years |
| Semi-major axis | 2.39 au |
| Perihelion – aphelion | 2.02 – 2.75 au |
| Eccentricity | 0.153 |
| Inclination | 3.64° |
| Closest distance between its orbit and Earth's (MOID) | 1.00 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 10 October 1999
- (12932) Conedera
- (13408) Deadoklestic
- (16092) Anudeepgolla
- (17180) Rupertli
- (20623) Davidyoung
- (20648) Ryukihyodo
- (20649) Miklenov
- (20650) Saillenfest
- (21860) Joannaguy
- (22898) Falce
- (22936) Ricmccutchen
- (22937) Nataliavella