Berkeley 21 BVI photometry
收藏B2FIND2026-04-11 收录
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https://b2find.eudat.eu/dataset/c0ea9828-d354-5aed-b05a-e0897dddcba0
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We present CCD BVI photometry of the old open cluster Berkeley 21, one of the most distant clusters in the Galactic anticentre direction, and possibly the lowest metallicity...
