(13015) Noradokei Main-belt Asteroid
Discovered on 14 December 1987 by T. Seki at Geisei.
Noradokei is a clock tower handmade by Hatakenaka Genma in 1897 at Aki city, Kochi prefecture, when clocks were still new to Japan. People working on the nearby fields were able to tell precise times from this clock. It is preserved as the city's cultural symbol.Naming citation (MPC batch dated 2018-04-30), IAU / Minor Planet Center, via NASA/JPL
Where Noradokei is today
Seen from above the solar system on 2026-10-14: Noradokei is 3.06 au from the Sun and 4.04 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 13015 |
| Provisional designation | 1987 XC |
| Orbit class | Main-belt Asteroid |
| Diameter | 6.26 km (#8,566 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.164 |
| Rotation period | 11.7 hours |
| Absolute magnitude (H) | 13.84 |
| Orbital period | 4.09 years |
| Semi-major axis | 2.56 au |
| Perihelion – aphelion | 1.88 – 3.24 au |
| Eccentricity | 0.266 |
| Inclination | 16.5° |
| Closest distance between its orbit and Earth's (MOID) | 0.945 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.