UCAC4 nearby star survey

We use data from the U.S. Naval Observatory fourth CCD Astrograph Catalog (UCAC4) in combination with photometry from the AAVSO Photometric All-Sky Survey and Two Micron All-Sky...本研究采用美国海军天文台第四代CCD天体测量星表（fourth CCD Astrograph Catalog，UCAC4）的数据，并结合AAVSO全天测光巡天（AAVSO Photometric All-Sky Survey）与2微米全天巡天（Two Micron All-Sky...）的测光资料。