(17544) Kojiroishikawa Main-belt Asteroid
Discovered on 15 September 1993 by Endate, K., Watanabe, K. at Kitami.
Kojiro Ishikawa (b. 1947) is a Japanese amateur astronomer who has been very active in popularizing astronomy since he was a high school student. Since 1980 he has visited New Zealand frequently to take photographs of the southern sky.Naming citation (MPC batch dated 2016-04-22), IAU / Minor Planet Center, via NASA/JPL
Where Kojiroishikawa is today
Seen from above the solar system on 2026-10-14: Kojiroishikawa is 2.15 au from the Sun and 3.02 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 17544 |
| Provisional designation | 1993 RF2 |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.51 km (#13,943 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.362 |
| Absolute magnitude (H) | 14.29 |
| Orbital period | 3.39 years |
| Semi-major axis | 2.26 au |
| Perihelion – aphelion | 1.84 – 2.67 au |
| Eccentricity | 0.184 |
| Inclination | 4.81° |
| Closest distance between its orbit and Earth's (MOID) | 0.831 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Kojiro
All asteroids named after someone called Kojiro
Also discovered on 15 September 1993
- (8039) Grandprism
- (9381) Lyon
- (10356) Rudolfsteiner
- (10557) Rowland
- (10558) Karlstad
- (11083) Caracas
- (11572) Schindler
- (12356) Carlscheele
- (13113) Williamyeats
- (14911) Fukamatsu
- (15786) Hoshioka
- (19224) Orosei