Iota Trianguli
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Both components of ι Trianguli are spectroscopic binaries and the brighter pair is variable. It has been given the variable star designation TZ Trianguli. The variations are due to the ellipsoidal shape of the stars as they rotate, and also it is classified as an RS Canum Venaticorum variable.
Together with 10 Trianguli and 12 Trianguli, it forms part of the obsolete Triangulum Minus.