(911) Agamemnon Jupiter Trojan
Discovered on 19 March 1919 by K. Reinmuth at Heidelberg.
Where Agamemnon is today
Seen from above the solar system on 2026-10-14: Agamemnon is 5.52 au from the Sun and 6.49 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 911 |
| Provisional designation | A919 FB |
| Orbit class | Jupiter Trojan |
| Diameter | 131 km (#123 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0720 |
| Rotation period | 6.59 hours |
| Spectral type | D |
| Absolute magnitude (H) | 7.87 |
| Orbital period | 12.2 years |
| Semi-major axis | 5.29 au |
| Perihelion – aphelion | 4.93 – 5.64 au |
| Eccentricity | 0.0667 |
| Inclination | 21.8° |
| Closest distance between its orbit and Earth's (MOID) | 4.03 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.