CHIUN (kī'ŭn). Possibly Saturn as god, but the meaning of the Hebrew word is uncertain. Thus in Amos.5.26 where KJV has “the tabernacle of your Molech and Chiun your images, the star of your god,” NIV has “the shrine of your king, the pedestal of your idols, the star of your god” (but see footnote). RSV translates: “Sakkuth your king, and Kaiwan your star-god, your images.”
. KJV form of Kaiwan.
International Standard Bible Encyclopedia (1915)
ki’-un: Thus Hebrew kiyun, is transliterated in Am 5:26 the King James Version. The vowels represent an assimilation to some such word as shiqquts, "detestable thing," or gillul, "idol" (properly "a filthy thing"), in consonance with the well-known habit of the punctuators (compare molekh, Molech with the vowels of bosheth, "shame"). The Syriac version has preserved the correct vocalization; apparently also the Septuagint, albeit the consonants have suffered corruption (so particularly in the Greek manuscripts of Ac 7:43). There can be no doubt that we should vocalize kewan = the Assyrian Kai(a)-wanu = Kaiamanu by which at least in late Babylonian Saturn was indicated. The passage in Amos refers to the Saturn worship which appears to have been in vogue in the prophet’s days. The Israelites shall carry with them into exile the images of their gods (render with the margin of the Revised Version (British and American): "Yea, ye shall take up," etc.). The received vocalization is as old as Aquila and Symmachus. Max L. Margolis
Called in Ac 7:43
"Rephan" (Rhemphan) the planet Saturn.