(11149) Tateshina Main-belt Asteroid
Discovered on 5 December 1997 by T. Kobayashi at Oizumi.
Tateshina is an old volcano located in the Yatsugatake mountains. Its height is 2530 m and it looks like a hanging bell. It is also called the Venus mountain because of its tender feature. It is one of the 100 most celebrated mountains of Japan.Naming citation (20051215/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Tateshina is today
Seen from above the solar system on 2026-10-14: Tateshina is 2.58 au from the Sun and 2.89 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 11149 |
| Provisional designation | 1997 XZ9 |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.49 km (#14,002 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.438 |
| Rotation period | 12.8 hours |
| Absolute magnitude (H) | 14.19 |
| Orbital period | 3.82 years |
| Semi-major axis | 2.44 au |
| Perihelion – aphelion | 2.30 – 2.58 au |
| Eccentricity | 0.0573 |
| Inclination | 5.05° |
| Closest distance between its orbit and Earth's (MOID) | 1.32 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.