(12238) Actor Jupiter Trojan
Discovered on 17 December 1987 by Elst, E. W., Pizarro, G. at La Silla.
Actor was the alleged father of Cteatos and Eurytos, two Greek warriors who beat Nestor in the chariot race.Naming citation (20030106/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Actor is today
Seen from above the solar system on 2026-10-14: Actor is 5.74 au from the Sun and 6.72 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 12238 |
| Provisional designation | 1987 YU1 |
| Orbit class | Jupiter Trojan |
| Diameter | 30.3 km (#1,350 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0920 |
| Rotation period | 7.28 hours |
| Absolute magnitude (H) | 10.92 |
| Orbital period | 11.8 years |
| Semi-major axis | 5.18 au |
| Perihelion – aphelion | 4.54 – 5.82 au |
| Eccentricity | 0.124 |
| Inclination | 21.1° |
| Closest distance between its orbit and Earth's (MOID) | 3.55 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.