PHOTOMETRY OF 11 ASTEROIDS AT SMALL PHASE ANGLES

Photoelectric photometry in the Johnson V and B bands for 11 asteroids is presented. We determine the synodic rotation period for 121 Hermio ne (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 publishe d periods for 276 Adelheid, 344 Desiderata, and 984 Gretia are confirm ed. We also present B - V colour indices and provide new information f or the taxonomic classification of three of the objects. The objects w ere chosen to give good solar phase angle coverage at small solar phas e angles; for 276 Adelheid and 344 Desiderata we obtained subdegree ob servations.