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chi Cygni minimum 2018


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About this observation
Gary Poyner
Time of observation
24/07/2018 - 17:53
chi Cyg
Observing location
22cm f6 dobsonian
51cm f4 dobsonian

The 2018 minimum of the Mira star chi Cygni occured on June 27 at magnitude 13.5, some 402 days after the 2017 minimum.  The catalogued mean period for chi Cyg is 408.5d.  The May 2017 minimum was one of the brightest on record, being a whole magnitude brighter than this one.

The classical slower fade to minimum followed by a steeper rise which is characteristic of this star is evident in this plot.  Maximum brightness is expected sometime in December 2018.

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