Photometry of eleven asteroids at small phase angles

Kurzfassung

Photoelectric photometry in the Johnson V and B bands for 11 asteroids is presented. We determine the synodic rotation period for 121 Hermione (5.6 hr), 162 Laurentia (11.87 hr), 508 Princetonia (52.8 hr), 510 Mabella (19.40 hr?), and 636 Erika (14,62 hr). The previously published periods for 276 Adelheid, 344 Desiderata, and 984 Gretia are confirmed. We also present B-V colour indices and provide new information for the taxonomic classification of three of the objects. The objects were chosen to give good solar phase angle coverage at small solar phase angles; for 276 Adelheid and 344 Desiderata we obtained subdegree observations.