BV(RI)_C_H{alpha} photometry of NGC 663
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https://b2find.eudat.eu/dataset/3869cee3-145a-5f5e-9e1e-0a9332eff64d
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资源简介：
We present new BV(RI)C_H{alpha} photometry of the young open cluster NGC 663. The H{alpha} photometry is complete down to magnitude R_C=15.4, corresponding to spectral type A5...
