(18278) Dymas Jupiter Trojan

Discovered on 16 October 1977 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar.

Dymas was a king of Phrygia and father of Priam's second wife Hekabe (in Latin, Hecuba).Naming citation (WGSBN Bull. 4, #13, 4), IAU / Minor Planet Center, via NASA/JPL

👶 Dymas as a baby name

Where Dymas is today

Seen from above the solar system on 2026-10-14: Dymas is 5.52 au from the Sun and 4.76 au from Earth. Computed from JPL's orbital elements.

Facts

Number	18278
Provisional designation	4035 T-3
Orbit class	Jupiter Trojan
Diameter	28.9 km (#1,431 largest of 17,440 named asteroids with a measured size)
Albedo	0.0770
Rotation period	28.1 hours
Absolute magnitude (H)	11.47
Orbital period	11.8 years
Semi-major axis	5.17 au
Perihelion – aphelion	4.82 – 5.52 au
Eccentricity	0.0681
Inclination	17.9°
Closest distance between its orbit and Earth's (MOID)	3.82 au

Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.

Also discovered on 16 October 1977

More named asteroids discovered by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T.

All 958

← (18268) Dardanos · (18281) Tros →