(21022) Ike Main-belt Asteroid
Discovered on 2 February 1989 by T. Seki at Geisei.
Koichi Ike (b. 1925) was born in Tosa city in Kochi prefecture. He took an interest in astronomy by reading science magazines when he was a boy in primary school. He is a long-time friend and assistant of the discoverer, who worked together with Ike in astronomical research and observation.Naming citation (20040107/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
👶 Ike as a baby name🐶 Ike as a dog name
Where Ike is today
Seen from above the solar system on 2026-10-14: Ike is 1.94 au from the Sun and 2.87 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21022 |
| Provisional designation | 1989 CR |
| Orbit class | Main-belt Asteroid |
| Diameter | 8.11 km (#6,457 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.203 |
| Rotation period | 7.55 hours |
| Absolute magnitude (H) | 13.28 |
| Orbital period | 4.11 years |
| Semi-major axis | 2.57 au |
| Perihelion – aphelion | 1.92 – 3.21 au |
| Eccentricity | 0.251 |
| Inclination | 25.0° |
| 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 discovered on 2 February 1989
- (4543) Phoinix
- (4836) Medon
- (5063) Monteverdi
- (6302) Tengukogen
- (6709) Hiromiyuki
- (7699) Bozek
- (8831) Brandstrom
- (9577) Gropius
- (11037) Distler
- (15238) Hisaohori
- (22291) Heitifer
- (30798) Graubunden