A second part of the pre-perihellon photoelectric measurements of P/Halley obtained at the Skalnaté Pleso Observatory is presented. The observations cover 9 nlghts from November 8, 1985 to January 5, 1986. A set of focal diaphragms of the followlng diameters was used: 29.53", 48.98", 81.08", 137.34" and 220.53". Results of thls paper are magnltudes in focal diaphragms in the fllters Cont. 365.0 nm, Cont. 484.5 nm, CO^, C2, C3 and CN. Coma diameters, photometric parameters and continuum colors are also determined.
The occurrence of LDE flares in the last three solar cycles
has been investigated. Generally, in all the cycles considered, LDE flares mainly originated during a 6-year interval of the respective cycle (2 years before and 4 years after the cycle maximum). The highest LDE flare occurrence was observed in the ascending phase of the 22nd cycle (monthly mean number in 1989 - 32, in 1970 - 19 and in 1980 - 14 LDE (M-X) flares).
Trafficking of the rhoptry chimeric protein RhopH2-GFP, which contains RhopH2 signal peptide plus the downstream five amino acids, was dissected by treating parasites with Brefeldin A at three different time points. Twenty eight hrs-stage trophozoites accumulated the chimera within the parasite endoplasmic reticulum. In 32 hrs-stage schizonts, the chimera was distributed in the parasite cytoplasm but not in the parasitophorous vacuole. In 36 hrs stage-schizonts, the chimera was detected in the individual parasitophorous vacuoles of the developing merozoites and, in contrary to non-treated parasites, no immature rhoptry vesicles could be detected in the cytoplasm of immature merozoites. These data show that this chimera is trafficked to the rhoptries via Brefeldin A-sensitive pathway indicating that this trafficking is similar to that of the endogenous rhoptry proteins, and that the five amino acids downstream of the signal peptide cleavage site may contain the sorting signal required for rhoptry targeting.