Nielsen, E. L.Close, L. M.Guirado, J. C.Biller, B. A.Lenzen, R.Brandner, W.Hartung, M.Lidman, C.2025-06-242025-06-240004-6337RIS:urn:3D5158451024E5EBF6B3899BDAB0C64Ehttps://hdl.handle.net/1885/733764861We expand upon the results of Close et al. (2005) regarding the young, low-mass object AB Dor C and its role as a calibration point for theoretical tracks. We present an improved spectral reduction and a new orbital solution with two additional epochs. Our improved analysis confirms our spectral type of M8 (±1) and mass of 0.090 ±0.003 M\sun for AB Dor C. Comparing the results for AB Dor C with other young, low-mass objects with dynamical masses we find a general trend where current evolutionary models tend to over-predict the temperature (or under-predict the mass) for low-mass stars and brown dwarfs. Given our precision, there is a ∼99% chance that the mass of AB Dor C is underestimated by the DUSTY tracks in the HR diagram.7eninfrared: starsstars: formationstars: low-massbrown dwarfsstars: pre-main sequencestars: individual (AB Dor)Astrophysics2005-12-0110.1002/asna.20051044229844445789