(18707) Annchi Main-belt Asteroid
Discovered on 21 April 1998 by LINEAR at Socorro.
Ann Chi (b. 1986) is a finalist in the 2004 Intel Science Talent Search, a science competition for high school seniors. She was also awarded third place in the 2003 Intel International Science and Engineering Fair for her chemistry project. She attends the Terre Haute South Vigo High School, Terre Haute, Indiana.Naming citation (20040415/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Annchi is today
Seen from above the solar system on 2026-10-14: Annchi is 2.38 au from the Sun and 3.37 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 18707 |
| Provisional designation | 1998 HO96 |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.24 km (#14,629 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.352 |
| Rotation period | 72.2 hours |
| Absolute magnitude (H) | 14.59 |
| Orbital period | 4.08 years |
| Semi-major axis | 2.55 au |
| Perihelion – aphelion | 2.07 – 3.04 au |
| Eccentricity | 0.190 |
| Inclination | 6.84° |
| Closest distance between its orbit and Earth's (MOID) | 1.09 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Ann
- (7804) Boesgaard
- (9774) Annjudge
- (12112) Sprague
- (14570) Burkam
- (22414) Hornschemeier
- (23018) Annmoriarty
- (24316) Anncooper
- (25511) Annlipinsky
- (25512) Anncomins
- (30396) Annleonard
- (31272) Makosinski
- (48774) Anngower
All asteroids named after someone called Ann
Also discovered on 21 April 1998
- (9244) Visnjan
- (11715) Harperclark
- (11716) Amahartman
- (11718) Hayward
- (11719) Hicklen
- (11720) Horodyskyj
- (11721) Shawnlowe
- (11724) Ronaldhsu
- (11725) Victoriahsu
- (12091) Jesmalmquist
- (12092) Erinorourke
- (12093) Chrimatthews