Rotation Period Determinations for 11 Parthenope, 38 Leda, 111 Ate 194 Prokne, 217 Eudora, and 224 Oceana

Synodic rotation periods and amplitudes have been found for these asteroids: 11 Parthenope 13.722 ± 0.001 h, 0.10 ± 0.02 mag with 3 maxima and minima per cycle; 38 Leda 12.834 ± 0.001 h, 0.15 ± 0.01 mag; 99 Dike 18.127 ± 0.002 h, 0.22 ± 0.02 mag; 111 Ate 22.072 ± 0.001 h, 0.12 ± 0.01 mag with an irregular lightcurve; 194 Prokne 15.679 ± 0.001 h, 0.16 ± 0.02 mag; 217 Eudroa 25.253 ± 0.002 h, 0.22 ± 0.04 mag; 224 Oceana 9.401 ± 0.001 h, 0.09 ± 0.01 mag. An alternative 18.8 hour period suggested for 224 Oceana is definitively rejected.