A CCD image archive of comet C/1995 O1 (Hale-Bopp): Dust expansion velocities

An optical archive of comet Hale-Bopp was obtained over 28 nights from June 1996 to May 1997 covering a range of heliocentric distances of r = 4.12 - 0.91. The CCD images were obtained with the 0.8-m University of Washington Manastash Ridge Observatory and the 0.25-m Pennsylvania State University at Erie mobile observatory. The reduced images clearly document the evolution of features of the coma, which were dominated by radial jets from r = 4.1 - 2.3 AU, curved fan-shaped jets from r = 1.2 - 1.0 AU, and arcs or shells for 0.9 < r <1.0 AU. We present the images and derive an average dust expansion velocity of V-dust = 0.67 +/- 0.07 km s(-1) from measurements of the arc features. The images in the archive will be made available to other researchers for further study.