(18457) Syoheiyamamoto Main-belt Asteroid
Discovered on 5 March 1995 by Hirasawa, M., Suzuki, S. at Nyukasa.
Syohei Yamamoto (b. 1991) is a Japanese speech-language-hearing therapist. He works at Minamino Hospital in Hachioji, Japan. He treated the first discoverer when he was hospitalized for a cerebral infarction.Naming citation (WGSBN Bull. 3, #17, 5), IAU / Minor Planet Center, via NASA/JPL
Where Syoheiyamamoto is today
Seen from above the solar system on 2026-10-14: Syoheiyamamoto is 1.99 au from the Sun and 2.86 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 18457 |
| Provisional designation | 1995 EX7 |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.09 km (#14,998 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.322 |
| Absolute magnitude (H) | 14.4 |
| Orbital period | 3.45 years |
| Semi-major axis | 2.29 au |
| Perihelion – aphelion | 1.95 – 2.62 au |
| Eccentricity | 0.148 |
| Inclination | 0.570° |
| Closest distance between its orbit and Earth's (MOID) | 0.944 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 5 March 1995
- (8210) NANTEN
- (8307) Peltan
- (10857) Bluthner
- (12782) Mauersberger
- (14036) Yasuhirotoyama
- (14037) Takakikasahara
- (18458) Caesar
- (27864) Antongraff
- (29347) Natta
More named asteroids discovered by Hirasawa, M., Suzuki, S.
- (6416) Nyukasayama
- (6499) Michiko
- (6918) Manaslu
- (7028) Tachikawa
- (7067) Kiyose
- (7353) Kazuya
- (7891) Fuchie
- (7892) Musamurahigashi
- (8100) Nobeyama
- (8200) Souten
- (8530) Korbokkur
- (8551) Daitarabochi
← (18456) Misik · (18458) Caesar →