| Issue |
A&A
Volume 391, Number 2, August IV 2002
|
|
|---|---|---|
| Page(s) | 659 - 663 | |
| Section | Interstellar and circumstellar matter | |
| DOI | https://doi.org/10.1051/0004-6361:20020860 | |
| Published online | 02 August 2002 | |
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
Received:
22
January
2002
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
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