OEJV# Publication's title Author   Date
  Abstract / note  

0013X Cyg: observations from 1886 until today
403 kB
Ralf Meyer2005-12-31
 Because of methodical reasons many early observations of X Cygni between 1886 and 1914 are biased. Taking these biased data out of calculation there is no evidence of a period change left.

Simbad object(s): X Cyg,


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