(4811) Semashko Main-belt Asteroid
Discovered on 25 September 1973 by L. V. Zhuravleva at Nauchnyj.
Where Semashko is today
Seen from above the solar system on 2026-10-14: Semashko is 1.92 au from the Sun and 2.76 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 4811 |
| Provisional designation | 1973 SO3 |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.77 km (#13,296 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.247 |
| Absolute magnitude (H) | 14.13 |
| Orbital period | 3.37 years |
| Semi-major axis | 2.25 au |
| Perihelion – aphelion | 1.83 – 2.66 au |
| Eccentricity | 0.183 |
| Inclination | 5.06° |
| Closest distance between its orbit and Earth's (MOID) | 0.827 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 25 September 1973
- (3157) Novikov
- (4303) Savitskij
- (4877) Humboldt
- (5412) Rou
- (6162) Prokhorov
- (6682) Makarij
- (6938) Soniaterk
- (8319) Antiphanes
- (8773) Torquilla
- (8774) Viridis
- (8974) Gregaria
- (8982) Oreshek