(11321) Tosimatumoto Main-belt Asteroid
Discovered on 21 February 1995 by T. Seki at Geisei.
Tosikazu Matumoto (b. 1941), a comet hunter in Takefu, Fukui prefecture, is manager of the comet section of the Oriental Astronomical Association and a key member of Yatsusugi-Tentai-Kansokujo, an astronomical observation group.Naming citation (WGSBN Bull. 3, #12, 7), IAU / Minor Planet Center, via NASA/JPL
Where Tosimatumoto is today
Seen from above the solar system on 2026-10-14: Tosimatumoto is 3.11 au from the Sun and 4.07 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 11321 |
| Provisional designation | 1995 DE1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 9.19 km (#5,632 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.191 |
| Rotation period | 7.80 hours |
| Absolute magnitude (H) | 12.9 |
| Orbital period | 5.24 years |
| Semi-major axis | 3.02 au |
| Perihelion – aphelion | 2.76 – 3.28 au |
| Eccentricity | 0.0861 |
| Inclination | 9.55° |
| Closest distance between its orbit and Earth's (MOID) | 1.75 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.