(15715) Osuginaoki Main-belt Asteroid
Discovered on 28 October 1989 by Mizuno, Y., Furuta, T. at Kani.
Osugi Naoki (b. 1965) is a Japanese amateur astronomer who undertakes visual and photographic observation of comets. He is involved in astronomical-outreach activities and is a member of the Hoshi-no-hiroba and Hoshi-na-kamahimeji astronomy groups.Naming citation (WGSBN Bull. 6, #16, 6), IAU / Minor Planet Center, via NASA/JPL
Where Osuginaoki is today
Seen from above the solar system on 2026-10-14: Osuginaoki is 2.00 au from the Sun and 1.91 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 15715 |
| Provisional designation | 1989 UN1 |
| Orbit class | Main-belt Asteroid |
| Rotation period | 5.33 hours |
| Absolute magnitude (H) | 14.91 |
| Orbital period | 4.07 years |
| Semi-major axis | 2.55 au |
| Perihelion – aphelion | 1.82 – 3.28 au |
| Eccentricity | 0.285 |
| Inclination | 4.81° |
| Closest distance between its orbit and Earth's (MOID) | 0.829 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.