(5730) Yonosuke Main-belt Asteroid
Discovered on 13 October 1988 by Y. Oshima at Gekko.
Yonosuke Nakano (1887-1974), a founder of the Gekko Observatory, received the Silver Cup from the Japanese Government in 1973 for his work in education in various fields, including astronomy.Naming citation (20070926/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Yonosuke is today
Seen from above the solar system on 2026-10-14: Yonosuke is 3.05 au from the Sun and 3.90 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 5730 |
| Provisional designation | 1988 TP1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 8.22 km (#6,377 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.314 |
| Rotation period | 5.45 hours |
| Absolute magnitude (H) | 12.56 |
| Orbital period | 4.97 years |
| Semi-major axis | 2.91 au |
| Perihelion – aphelion | 2.61 – 3.21 au |
| Eccentricity | 0.104 |
| Inclination | 1.86° |
| Closest distance between its orbit and Earth's (MOID) | 1.60 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.