(7257) Yoshiya Main-belt Asteroid
Discovered on 7 January 1994 by T. Kobayashi at Oizumi.
Yoshiya Watanabe (b. 1968) is a science educator and planetarian of the Osaka Science Museum. Although his main work is teaching astronomy, he also operates several nation wide networks for astronomical education and has organized monthly star-gazing campaigns since 1996.Naming citation (20020921/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Yoshiya is today
Seen from above the solar system on 2026-10-14: Yoshiya is 2.22 au from the Sun and 2.73 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 7257 |
| Provisional designation | 1994 AH1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 5.15 km (#10,344 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.319 |
| Rotation period | 6.47 hours |
| Absolute magnitude (H) | 13.64 |
| Orbital period | 3.63 years |
| Semi-major axis | 2.36 au |
| Perihelion – aphelion | 2.12 – 2.61 au |
| Eccentricity | 0.103 |
| Inclination | 3.71° |
| Closest distance between its orbit and Earth's (MOID) | 1.13 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.