(11428) Alcinoos Jupiter Trojan
Discovered on 24 September 1960 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar.
Alcinoös, king of the Phaeacians, gave Odysseus shelter and aid.Naming citation (20000124/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Alcinoos is today
Seen from above the solar system on 2026-10-14: Alcinoos is 5.36 au from the Sun and 6.33 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 11428 |
| Provisional designation | 4139 P-L |
| Orbit class | Jupiter Trojan |
| Diameter | 32.4 km (#1,263 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0670 |
| Absolute magnitude (H) | 11.17 |
| Orbital period | 12.3 years |
| Semi-major axis | 5.33 au |
| Perihelion – aphelion | 5.26 – 5.40 au |
| Eccentricity | 0.0133 |
| Inclination | 17.3° |
| Closest distance between its orbit and Earth's (MOID) | 4.29 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 24 September 1960
- (1743) Schmidt
- (1744) Harriet
- (1776) Kuiper
- (1777) Gehrels
- (1795) Woltjer
- (1808) Bellerophon
- (1809) Prometheus
- (1810) Epimetheus
- (1811) Bruwer
- (1812) Gilgamesh
- (1846) Bengt
- (1868) Thersites