Photometry and Proper Motions in M67
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https://b2find.eudat.eu/dataset/b1d79280-e7cc-5a12-8254-5e461d9d31ba
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Relative proper motions were determined for 1068 stars with limiting magnitude b=16.5 and located within an area 130'*130' centered at alpha=8h 47.7m,delta=+12 deg.00' and...
已为1068颗恒星测定了相对自行（relative proper motions），这些恒星的b波段极限星等为16.5，且均位于以赤经α=8时47.7分、赤纬δ=+12°00′为中心的130′×130′天区范围之内，且……
