Assertion: asterism's star | /r/HasProperty | 863±3 arcseconds per year
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Source sentences:
text: In Delphinus, in extremes of distance, Gliese 795 is the closest known star at 54.95 ly and rapidly moves east over a period of centuries (863±3 arcseconds per year); whereas the giant of blue colour, W Delphini is at 2203.81 ly at 9.76 magnitude.