(15703) Yrjola Main-belt Asteroid
Discovered on 21 September 1987 by E. Bowell at Anderson Mesa.
Ilkka Yrjölä (b. 1959), a long-term dedicated amateur astronomer in Kuusankoski, Finland, has observed meteor showers using systematic counts of reflections by meteor forward scatter. He has confirmed many meteor outbursts, including the 1994 Aurigid shower.Naming citation (WGSBN Bull. 5, #19, 5), IAU / Minor Planet Center, via NASA/JPL
Where Yrjola is today
Seen from above the solar system on 2026-10-14: Yrjola is 2.04 au from the Sun and 1.87 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 15703 |
| Provisional designation | 1987 SU1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 2.83 km (#15,596 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.349 |
| Absolute magnitude (H) | 14.79 |
| Orbital period | 3.28 years |
| Semi-major axis | 2.21 au |
| Perihelion – aphelion | 1.91 – 2.50 au |
| Eccentricity | 0.133 |
| Inclination | 6.03° |
| Closest distance between its orbit and Earth's (MOID) | 0.923 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Ilkka
All asteroids named after someone called Ilkka
Also discovered on 21 September 1987
- (4040) Purcell
- (4177) Kohman
- (5677) Aberdonia
- (5771) Somerville
- (6122) Henrard
- (6182) Katygord
- (6474) Choate
- (6512) de Bergh
- (6698) Malhotra
- (7011) Worley
- (9308) Randyrose
- (9563) Kitty