LenghuSky-8: An 8-Year All-Sky Cloud Dataset with Star-Aware Masks and Alt-Az Calibration for Segmentation and Nowcasting. - Yicheng Rui; Xiao-Wei Duan; Licai Deng; Fan Yang; Zhengming Dang; Zhengjun Du; Junhao Peng; Wenhao Chu; Umut Mahmut; Kexin Li; Yiyun Wu; Fabo Feng (CoRR, 2026)