(15663) Periphas Jupiter Trojan
Discovered on 29 September 1973 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar.
The Greek hero Periphas from Aetolia was killed by the god Ares. Ares tried to get the armor of Periphas, but Diomedes wounded Ares, with the help of Pallas Athene.Naming citation (20010705/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Periphas is today
Seen from above the solar system on 2026-10-14: Periphas is 5.73 au from the Sun and 6.72 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 15663 |
| Provisional designation | 4168 T-2 |
| Orbit class | Jupiter Trojan |
| Diameter | 36.2 km (#1,099 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0710 |
| Absolute magnitude (H) | 10.88 |
| Orbital period | 11.9 years |
| Semi-major axis | 5.21 au |
| Perihelion – aphelion | 4.66 – 5.76 au |
| Eccentricity | 0.105 |
| Inclination | 33.9° |
| Closest distance between its orbit and Earth's (MOID) | 3.69 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 29 September 1973
- (2049) Grietje
- (4357) Korinthos
- (4549) Burkhardt
- (4721) Atahualpa
- (4752) Myron
- (4876) Strabo
- (4978) Seitz
- (5151) Weerstra
- (5197) Rottmann
- (5243) Clasien
- (5244) Amphilochos
- (5266) Rauch