Temperature of a star in K from the B−V index (Ballesteros' formula)[1]:

Usage

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{{B−V to K|0.3}}

results in

7461.8637941006

Reference

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  1. ^ Ballesteros, F. J. (2012). "New insights into black bodies". EPL 97 (2012) 34008. arXiv:1201.1809.