The APASS (AAVSO Photometric All-Sky Survey) DR10 catalog is a comprehensive photometric catalog containing data on over 100 millions of stars across the entire sky. It is produced by the AAVSO and aims to provide precise and uniform photometric measurements in multiple photometric bands.


The data in the APASS catalog is obtained using a network of robotic telescopes located around the world. These telescopes use standardized photometric filters to measure the brightness of stars in different wavelength bands. The measurements are calibrated to ensure consistency and accuracy.


The APASS DR10 catalog provides photometric measurements in 8 bands: Johnson B and V, plus Sloan u' g' r' i' z_s and Z. It also includes astrometric information, such as star positions and proper motions.