Asteroid 624, the largest known Trojan asteroid, discovered in 1907 by the German astronomer August Kopff (1882–1960). It is a member of the group of Trojans at the L4 Lagrangian point 60° ahead of Jupiter. Hektor’s brightness varies by a factor of three as it rotates with a period of 6.92 hours. The light curve indicates that Hektor is highly elongated, 150 × 300 km; alternatively, it might be dumbbell-shaped, two asteroids in contact, or a close binary. Hektor is a D-type asteroid. Its orbit has a semimajor axis of 5.25 au, period 12.04 years, perihelion 5.13 au, aphelion 5.38 au, and inclination 18°.2.