WEBT observations at the Xinglong station of the Beijing Astronomical Observatory are done by Jingyao Hu and Jianyan Wei.
Telescope parameters: Long= +117.5750 deg, Lat= +40.3933 deg, Alt= 950 m, Loc_time= UTC+8;
Optical configuration: Newtonian, D= 0.6 m, f/D= 4.23; Seeing_typical= 2″, Skybrightness_typical= V=21.04 mag/arcsec^2;
CCD camera: Texas Instruments, CCD chip: TI-215, 1024×1024 pixels, 12×12 um pixel width.
Filters: Johnson B (GG385(2mm) + BG12(1mm) + BG18(1mm) + UG3(2mm)), Johnson V (GG495(2mm) + BG20(2mm) + KG3(2mm)); Johnson R (RG610(2mm) + BG20(2mm) + KG3(2mm); Johnson I (RG9(3mm)).