(5581) Mitsuko Main-belt Asteroid
Discovered on 10 February 1989 by Iwamoto, M., Furuta, T. at Tokushima.
Where Mitsuko is today
Seen from above the solar system on 2026-10-14: Mitsuko is 2.16 au from the Sun and 2.77 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 5581 |
| Provisional designation | 1989 CY1 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 14.19 |
| Orbital period | 3.67 years |
| Semi-major axis | 2.38 au |
| Perihelion – aphelion | 2.01 – 2.76 au |
| Eccentricity | 0.158 |
| Inclination | 2.49° |
| Closest distance between its orbit and Earth's (MOID) | 1.00 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.