libra Weighing planets with light. References IRTF Spectra: Cushing, M.C., Rayner, J.T, & Vacca, W.D. (2005, ApJ, 623, 1115) Rayner, J.T., Cushing, M.C., & Vacca, W.D. (2009, ApJS, 185, 289) PHOENIX models: Baraffe et al. 2015, Allard et al. 2015