TITLE: GCN CIRCULAR NUMBER: 22392 SUBJECT: GRB 180205A: Xinglong TNT optical observation DATE: 18/02/06 02:43:28 GMT FROM: L.P. Xin at NAOC L. P. Xin, F. Q. Pi, J. Y. Wei, Y. L. Qiu, J. S. Deng, J. Wang, X. H. Han, X. M. Meng, C. Wu, D. TURPIN, H. L. Li report: We began to observe GRB 180205A (Evens et al., GCN 22381) with Xinglong 0.8-m TNT telescope, China, at 2018-02-05, 16:11:42(UT), about 12.6 hours the burst. We obtained several R-band images with an exposure time of 300 sec for each frame. The optical afterglow (Evens et al., GCN 22381; Zheng et al., GCN 22382; Bolmer et al., GCN 22383, 22391; Tanvir et al., GCN 22384; Volnova et al., GCN 22387, Wiersema et al., GCN 22388; Falcon et al., 22390 ) is clearly detected in our stacked image with 5*300 sec. The brightness is estimated to be about R~19.97 mag calibrated by USNO B1.0 R2 mag at about 12.7 hours after the burst, We acknowledge the excellent support from Xinglong staff Miao Zhang.