Lightcurve Analysis of an Unbiased Sample of Trojan Asteroids

Lightcurve observations of ten Trojan asteroids made at the Calvin Observatory are reported: 1143 Odysseus, 1208 Troilus, 2920 Automedon, 3709 Polypoites, 5144 Achates, 5638 Deikoon, (7352) 1994 CO, (34746) 2001 QE91, (38050) 1998 VR38, and (48438) 1989 WJ2. Synodic rotation periods were determined for all but (7352) 1994 CO, which showed no significant variation. The sample was unbiased with regard to period, and has a median value, 18.9 hours, significantly longer than for similarly sized main-belt objects. This may be evidence for a lower average mass density among the Trojans.