(23504) Haneda Main-belt Asteroid
Discovered on 7 March 1992 by T. Seki at Geisei.
Toshio Haneda (1910-1992) was a comet hunter from Minamisoma city (formerly Haramachi city), Fukushima prefecture, He discovered comet D/1978 R1 (Haneda-Campos) on 1978 Sept. 1. He was then the world's oldest living comet discoverer. The name was suggested by H. Sato.Naming citation (20070106/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Haneda is today
Seen from above the solar system on 2026-10-14: Haneda is 2.42 au from the Sun and 3.23 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 23504 |
| Provisional designation | 1992 EX |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.71 km (#11,207 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.289 |
| Absolute magnitude (H) | 13.94 |
| Orbital period | 4.34 years |
| Semi-major axis | 2.66 au |
| Perihelion – aphelion | 2.42 – 2.90 au |
| Eccentricity | 0.0895 |
| Inclination | 10.2° |
| Closest distance between its orbit and Earth's (MOID) | 1.44 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Toshio
All asteroids named after someone called Toshio