(27827) Ukai Main-belt Asteroid
Discovered on 9 December 1993 by Hirasawa, M., Suzuki, S. at Nyukasa.
Kazuhiko Ukai (1951-2009) was a physicist at Waseda University. A member of the Waseda Astronomical Association, he participated in the construction of an observatory hut in Nobeyama in 1970, camping out there for 30 consecutive days and becoming the first person to spend 100 nights in the hut.Naming citation (20100130/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Ukai is today
Seen from above the solar system on 2026-10-14: Ukai is 2.73 au from the Sun and 3.44 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 27827 |
| Provisional designation | 1993 XJ1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 9.20 km (#5,623 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.109 |
| Absolute magnitude (H) | 13.98 |
| Orbital period | 4.57 years |
| Semi-major axis | 2.75 au |
| Perihelion – aphelion | 2.45 – 3.06 au |
| Eccentricity | 0.109 |
| Inclination | 6.98° |
| Closest distance between its orbit and Earth's (MOID) | 1.47 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Kazuhiko
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