Zeta Trianguli Australis

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What Wikipedia says

Zeta Trianguli Australis is a spectroscopic binary star system in the southern constellation Triangulum Australe. The pair have a combined apparent visual magnitude of 4.90, which is bright enough to be visible to the naked eye.

Excerpt from the Wikipedia article “Zeta Trianguli Australis”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: IAU and Sky & Telescope magazine (Roger Sinnott & Rick Fienberg), CC BY 3.0, via Wikimedia Commons.