EK Draconis: Long-term photometry on Sonneberg Sky-Patrol plates
Astrophysikalisches Institut Potsdam, An der Sternwarte 16, 14482 Potsdam, Germany
Corresponding author: H.-E. Fröhlich, HEFroehlich@aip.de
Accepted: 4 March 2002
We performed long-term photometry of the young solar analog EK Draconis (HD 129333) using 1030 blue-sensitive Sky-Patrol plates taken at Sonneberg Observatory from 1958 onwards. A secular dimming of mag/y beginning around 1975 was found. Hence, the recent trend first observed with Automatic Photoelectric Telescopes (APTs) is confirmed and traced back to the mid-seventies.
Key words: stars: activity / stars: individual: HD 129333 (EK Dra) / stars: late-type / stars: rotation / stars: variables: other
© ESO, 2002