BVI photometry of stars in Berkeley 18
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We present CCD BVI photometry for Berkeley 18, a rich open cluster located in the Galactic anticenter. The cluster age is similar to, or marginally lower than age of M 67. Its...
本研究提供了位于银反银心方向的富疏散星团伯克利18（Berkeley 18）的CCD（电荷耦合器件，Charge-Coupled Device）BVI测光数据。该星团的年龄与M 67（梅西耶67，Messier 67）星团相近，或略低于M 67星团的年龄。其……
