A University of Maryland research update dated September 22, 2026 highlights JWST observations of HATS-6 b, a warm Saturn-mass, Jupiter-size planet orbiting an M-dwarf star. The author manuscript analyzes two transit spectra and retrieves water, methane and ammonia signatures. Its final atmospheric model returns an equilibrium temperature near 514 K, nearly 200 K below an earlier estimate based on different assumptions.
The temperature is model-derived, not directly measured; clouds or hazes may help explain the difference, but their role remains uncertain. Checked September 23, 2026. The September 22 date is the research update, not a claim about journal issue publication.
Sources: University of Maryland research update: https://www.astro.umd.edu/news-events/news/giannina-guzman-caloca-detects-ammonia-and-unexpected-chill-distant-giant-planet · author manuscript: https://arxiv.org/abs/2608.16990
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