OH/IR star

Rarity: Common

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What Wikipedia says

An OH/IR star is an asymptotic giant branch (AGB), a red supergiant (RSG), or a red hypergiant (RHG) star that shows strong OH maser emission and is unusually bright at near-infrared wavelengths.

Excerpt from the Wikipedia article “OH/IR star”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Two Micron All Sky Survey (2MASS), a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation., Public domain, via Wikimedia Commons.