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Is there a stellar upper mass limit? Recent statistical work seems toindicate that there is and that it is in the vicinity of 150 solar masses. Inthis paper we use HST and ground-based data to investigate the brightestmembers of the cluster Pismis 24, one of which (Pismis 24-1) was previouslyinferred to have a mass greater than 200 solar masses, in apparent disagreementwith that limit. We determine that Pismis 24-1 is composed of at least threeobjects, the resolved Pismis 24-1SW and the unresolved spectroscopic binaryPismis 24-1NE. The evolutionary zero-age masses of Pismis 24-1SW, theunresolved system Pismis 24-1NE, and the nearby star Pismis 24-17 are allapproximately 100 solar masses, very large but under the stellar upper masslimit.Comment: 16 pages, 3 figures, accepted in ApJ, second astro-ph version  reflects changes suggested by refere

Pismis 24‐1: The Stellar Upper Mass Limit Preserved