The first U.S. Naval Observatory Astrometric Robotic Telescope Catalog URAT1 ...
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URAT1 is an observational catalog at a mean epoch between 2012.3 and 2014.6; ot covers the magnitude range 3 to 18.5 in R-band, with a positional precision of 5 to 40 mas. It...
URAT1是平均历元介于2012.3至2014.6之间的观测星表;该星表覆盖R波段(R-band)3至18.5星等的范围,位置精度为5至40毫角秒(mas)。其……



