EK Draconis: Long-term photometry on Sonneberg Sky-Patrol plates

Details EK Draconis: Long-term photometry on Sonneberg Sky-Patrol plates EK Draconis: Long-term photometry on Sonneberg Sky-Patrol plates

Aug 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002a%26a...391..659f&link_type=abstract

Astronomy and Astrophysics, v.391, p.659-663 (2002)

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12

Stars: Activity, Stars: Individual: Hd 129333 (Ek Dra), Stars: Late-Type, Stars: Rotation, Stars: Variables: Other

Scientific paper

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 0.0057+/- 0.0008 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.

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