In December, 1993, a photometric multisite campaign was undertaken in order to investigate the fascinating variable central star HD 35914 of the Planetary Nebula IC 418. 5 observatories were involved, 120 hours of data were obtained by a variety of techniques. HD 35914 exhibits irregular and cyclic light variations with a time scale of days and 6.5 hours respectively. A discussion of those variations can be found in the referred paper below.

• 0.5 meter telescope at the South African Astronomical Observatory, South Africa (observers R. Medupe and D. W. Kurtz)
• 1.0 meter telescope at Mt. John University Observatory, New Zealand (D. J. Sullivan)
• 0.6 meter telescope at Perth Observatory, Australia (P. V. Birch)
• 0.8 meter telescope at San Pedro Martir Observatory, Mexico (R. Costero & M. Alvarez)
• 0.8 meter telescope at Observatorio del Teide, Teneriffa (CCD, A. Herrero & M. A. Guerrero)

Publications following this campaign :

• Variable central stars of young Planetary Nebulae. I. Photometric multisite observations of IC 418 (G. Handler et al.), 1997, A&A; 320, 125