(1123) Shapleya Main-belt Asteroid
Discovered on 21 September 1928 by G. N. Neujmin at Simeis.
Where Shapleya is today
Seen from above the solar system on 2026-10-14: Shapleya is 2.57 au from the Sun and 3.55 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 1123 |
| Provisional designation | 1928 ST |
| Orbit class | Main-belt Asteroid |
| Diameter | 11.3 km (#4,433 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.278 |
| Rotation period | 52.9 hours |
| Absolute magnitude (H) | 11.7 |
| Orbital period | 3.32 years |
| Semi-major axis | 2.22 au |
| Perihelion – aphelion | 1.88 – 2.57 au |
| Eccentricity | 0.157 |
| Inclination | 6.42° |
| Closest distance between its orbit and Earth's (MOID) | 0.888 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.