Centaurus X-3

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What Wikipedia says

Centaurus X-3 (4U 1118–60) is an X-ray pulsar with a period of 4.84 seconds. It was the first X-ray pulsar to be discovered, and the third X-ray source to be discovered in the constellation Centaurus.

Excerpt from the Wikipedia article “Centaurus X-3”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: DECam plane survey data release 1 (DR1), CC0, via Wikimedia Commons.