(11865) Nakamuramasatsug Main-belt Asteroid
Discovered on 23 September 1989 by Mizuno, Y., Furuta, T. at Kani.
Masatsugu Nakamura (b. 1958) is a Japanese amateur astronomer who undertakes photographic observations of comets and other celestial objects. He organizes local stargazing events and is a member of the Hoshi-no-hiroba astronomy group and the Muroo Observatory.Naming citation (WGSBN Bull. 6, #16, 5), IAU / Minor Planet Center, via NASA/JPL
Where Nakamuramasatsug is today
Seen from above the solar system on 2026-10-14: Nakamuramasatsug is 2.68 au from the Sun and 2.64 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 11865 |
| Provisional designation | 1989 SC |
| Orbit class | Main-belt Asteroid |
| Diameter | 2.57 km (#16,126 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.411 |
| Absolute magnitude (H) | 14.5 |
| Orbital period | 3.28 years |
| Semi-major axis | 2.21 au |
| Perihelion – aphelion | 1.70 – 2.72 au |
| Eccentricity | 0.231 |
| Inclination | 6.78° |
| Closest distance between its orbit and Earth's (MOID) | 0.692 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.