(4973) Showa Outer Main-belt Asteroid
Discovered on 18 March 1990 by Endate, K., Watanabe, K. at Kitami.
Where Showa is today
Seen from above the solar system on 2026-10-14: Showa is 3.20 au from the Sun and 2.96 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 4973 |
| Provisional designation | 1990 FT |
| Orbit class | Outer Main-belt Asteroid |
| Diameter | 28.0 km (#1,486 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0680 |
| Absolute magnitude (H) | 11.66 |
| Orbital period | 6.34 years |
| Semi-major axis | 3.42 au |
| Perihelion – aphelion | 3.16 – 3.69 au |
| Eccentricity | 0.0780 |
| Inclination | 18.9° |
| Closest distance between its orbit and Earth's (MOID) | 2.20 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.