Differential CCD Photometry of Dubiago, Chiron and Hektor

Abstract

Differential CCD photometry of three asteroids – 624 Hektor, 1167 Dubiago and 2060 Chiron – were carried out using the 2.5-m Nordic Optical Telescope on La Palma between 1990 March 14–17. From the resulting light curves, the rotation period of Dubiago was obtained for the first time and found to be |$14^\text h_.\ 3\pm 0^\text h_.\ 1$|⁠, while the previously reported rotation periods for Hektor |$(6^\text h_.\ 921)$| and Chiron |$(5^\text h_.\ 92)$| are consistent with the present results. Light curve amplitudes of |$0.22\pm 0.02$| mag for Hektor, |$0.23\pm 0.02$| mag for Dubiago, and |$0.07\pm 0.02$| mag for Chiron were derived.