n MNASSA : Monthly Notes of the Astronomical Society of South Africa - Photometry of the BY Draconis star HR 7578 : observers page
|Article Title||Photometry of the BY Draconis star HR 7578 : observers page|
|© Publisher:||Astronomical Society of Southern Africa (ASSA)|
|Journal||MNASSA : Monthly Notes of the Astronomical Society of South Africa|
|Publication Date||Feb 2008|
|Pages||7 - 10|
|Keyword(s)||stars: HR 7578 (HD 188088) and stars: variable: BY Dra|
Observations of HR 7578 undertaken at the Nigel Observatory over a number of years have determined that if the system undergoes eclipse it is a partial one and the light drop in V is less than 0.02mag. The rotation period of HR 7578 is also variable but centered around 16.35 days, much longer than the expected 5 to 8 days. The amplitude of the light variation seems to indicate a cycle period of the order of 30.5 years.
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