(49442) Kubokoichi Main-belt Asteroid
Discovered on 20 December 1998 by F. Uto at Kashihara.
Koichi Kubo (b. 1963) is the secretary of the Korino Observatory in Minamisatsuma City, Kagoshima Prefecture. He is a well-known Japanese amateur astronomer and popularizer of astronomy in Kagoshima. At the observatory, Koichi is passionate about taking photographs of the Moon, Jupiter, and other planets.Naming citation (WGSBN Bull. 6, #3, 9), IAU / Minor Planet Center, via NASA/JPL
Where Kubokoichi is today
Seen from above the solar system on 2026-10-14: Kubokoichi is 3.03 au from the Sun and 2.37 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 49442 |
| Provisional designation | 1998 YD7 |
| Orbit class | Main-belt Asteroid |
| Diameter | 7.55 km (#7,054 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.262 |
| Absolute magnitude (H) | 13.31 |
| Orbital period | 4.88 years |
| Semi-major axis | 2.88 au |
| Perihelion – aphelion | 2.56 – 3.20 au |
| Eccentricity | 0.111 |
| Inclination | 1.67° |
| Closest distance between its orbit and Earth's (MOID) | 1.57 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.