(9256) Tsukamoto Main-belt Asteroid
Discovered on 29 September 1973 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar.
Named in memory of Tsukamoto Akitake (1833-1885), a geographer who worked for both the Tokugawa and Meiji governments. He recommended that the Japanese government adopt the Gregorian calendar to replace the lunisolar calendar. The government accepted his advice, and Japan adopted the Gregorian calendar on 1873 Jan. 1.Naming citation (19990402/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Tsukamoto is today
Seen from above the solar system on 2026-10-14: Tsukamoto is 2.21 au from the Sun and 3.21 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 9256 |
| Provisional designation | 1324 T-2 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 13.9 |
| Orbital period | 3.63 years |
| Semi-major axis | 2.36 au |
| Perihelion – aphelion | 2.06 – 2.66 au |
| Eccentricity | 0.128 |
| Inclination | 4.91° |
| Closest distance between its orbit and Earth's (MOID) | 1.05 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 29 September 1973
- (2049) Grietje
- (4357) Korinthos
- (4549) Burkhardt
- (4721) Atahualpa
- (4752) Myron
- (4876) Strabo
- (4978) Seitz
- (5151) Weerstra
- (5197) Rottmann
- (5243) Clasien
- (5244) Amphilochos
- (5266) Rauch