RI photometry in alpha Per and Pleiades

Photographic astrometry (proper motions and accurate positions), photometry (in the photographic R and I passbands) and membership probabilities for high probability proper...本数据集涵盖照相天体测量数据（包含天体自行与精确位置）、照相R和I通带波段的测光数据，以及高概率自行天体的成员概率