We report the discovery of a fifth candidate substellar system in the \sim 5–10 Myr TW Hydrae association – DENIS J124514.1 - 442907 .
This object has a NIR spectrum remarkably similar to that of 2MASS J1139511 - 315921 , a known TW Hydrae brown dwarf , with low surface gravity features such as a triangular-shaped H band , deep H _ { 2 } O absorption , weak alkali lines , and weak hydride bands .
We find an optical spectral type of M9.5 and estimate a mass of \lesssim 24 M _ { Jup } , assuming an age of \sim 5–10 Myr .
While the measured proper motion for DENIS J124514.1 - 442907 is inconclusive as a test for membership , its position in the sky is coincident with the TW Hydrae association .
A more accurate proper motion measurement , higher resolution spectroscopy for radial velocity , and a parallax measurement are needed to derive the true space motion and to confirm its membership .