(18418) Ujibe Main-belt Asteroid
Discovered on 15 October 1993 by Endate, K., Watanabe, K. at Kitami.
Tadashi Ujibe (b. 1943) is an amateur astronomer who constructed the three-meter dome of his own private observatory. His astrophotos capture solar prominences and the planets on a regular basis.Naming citation (20120831/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Ujibe is today
Seen from above the solar system on 2026-10-14: Ujibe is 2.08 au from the Sun and 2.46 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 18418 |
| Provisional designation | 1993 TV1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.45 km (#14,112 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.449 |
| Rotation period | 3.47 hours |
| Absolute magnitude (H) | 14.14 |
| Orbital period | 3.37 years |
| Semi-major axis | 2.25 au |
| Perihelion – aphelion | 1.79 – 2.70 au |
| Eccentricity | 0.202 |
| Inclination | 9.13° |
| Closest distance between its orbit and Earth's (MOID) | 0.802 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Tadashi
All asteroids named after someone called Tadashi
Also discovered on 15 October 1993
- (6340) Kathmandu
- (6412) Kaifu
- (6413) Iye
- (6981) Chirman
- (7133) Kasahara
- (7254) Kuratani
- (8393) Tetsumasakamoto
- (9632) Sudo
- (10561) Shimizumasahiro
- (11087) Yamasakimakoto
- (12362) Mumuryk
- (13582) Tominari