(12391) Ecoadachi Main-belt Asteroid
Discovered on 26 November 1994 by Endate, K., Watanabe, K. at Kitami.
Adachi Ward is one of 23 wards of Tokyo and is located in a natural environment in the city. The public administration and its inhabitants proceed together to preserve the native environment so that it may be passed to the next generation.Naming citation (20080819/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Ecoadachi is today
Seen from above the solar system on 2026-10-14: Ecoadachi is 2.40 au from the Sun and 1.87 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 12391 |
| Provisional designation | 1994 WE2 |
| Orbit class | Main-belt Asteroid |
| Diameter | 8.62 km (#6,053 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.137 |
| Rotation period | 36.9 hours |
| Absolute magnitude (H) | 13.06 |
| Orbital period | 4.55 years |
| Semi-major axis | 2.75 au |
| Perihelion – aphelion | 2.16 – 3.34 au |
| Eccentricity | 0.215 |
| Inclination | 9.11° |
| Closest distance between its orbit and Earth's (MOID) | 1.18 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.