Collaborative Asteroid Photometry and Lightcurve Analysis at Observatories OAEGG, OAC, EABA, and OAS

Synodic rotation periods and amplitudes are reported for: 1874 Kacivelia, 15.951 ± 0.001 h, 0.21 ± 0.02 mag; 2055 Dvorak, 4.4052 ± 0.0003 h, 0.17 ± 0.04 mag; 2185 Guangdong, 21.089 ± 0.002 h, 0.19 ± 0.02 mag; and 8059 Deliyannis, 6.0041 ± 0.0003 h, 0.39 ± 0.04 mag. The absolute magnitude (H) and/or slope parameter (G) for some of these asteroids are also reported.