(5541) Seimei Main-belt Asteroid
Discovered on 22 October 1976 by Kosai, H., Hurukawa, K. at Kiso.
Where Seimei is today
Seen from above the solar system on 2026-10-14: Seimei is 3.06 au from the Sun and 2.86 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 5541 |
| Provisional designation | 1976 UH16 |
| Orbit class | Main-belt Asteroid |
| Diameter | 13.2 km (#3,626 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.145 |
| Rotation period | 25.8 hours |
| Absolute magnitude (H) | 12.48 |
| Orbital period | 5.69 years |
| Semi-major axis | 3.19 au |
| Perihelion – aphelion | 2.74 – 3.64 au |
| Eccentricity | 0.141 |
| Inclination | 12.9° |
| Closest distance between its orbit and Earth's (MOID) | 1.74 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 22 October 1976
- (2271) Kiso
- (2337) Boubin
- (2340) Hathor
- (2470) Agematsu
- (2989) Imago
- (6846) Kansazan
- (10006) Sessai
- (11442) Seijin-Sanso
- (14313) Dodaira
- (16357) Risanpei
- (18289) Yokoyamakoichi