# Ward double

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A **Ward double** is one of 88 [binary stars](/source/Binary_star) recognized by the [Washington Double Star Catalog](/source/Washington_Double_Star_Catalog) (as NZO objects) that were identified by [Joseph Ward](/source/Joseph_Ward_(astronomer)) and his assistant Thomas Allison. Ward and Allison identified over 200 double stars during a survey of the southern sky at [Ward Observatory](/source/Ward_Observatory) over six years beginning in 1904.[1]

## References

1. ["Ward, Joseph Thomas"](http://www.teara.govt.nz/en/biographies/3w4/ward-joseph-thomas)

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