(22503) Thalpius Jupiter Trojan
Discovered on 7 October 1997 by Tichy, M., Moravec, Z. at Klet.
Thalpius, son of Eurytus, was leader of the Elean flotilla against Troy and one of those who entered Troy in the Wooden Horse. The citation was prepared by J. Ticha.Naming citation (20010509/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Thalpius is today
Seen from above the solar system on 2026-10-14: Thalpius is 5.43 au from the Sun and 6.41 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 22503 |
| Provisional designation | 1997 TB12 |
| Orbit class | Jupiter Trojan |
| Diameter | 15.7 km (#2,956 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.104 |
| Absolute magnitude (H) | 12.31 |
| Orbital period | 11.9 years |
| Semi-major axis | 5.21 au |
| Perihelion – aphelion | 4.86 – 5.57 au |
| Eccentricity | 0.0682 |
| Inclination | 9.90° |
| Closest distance between its orbit and Earth's (MOID) | 3.87 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.