MKN421 recent optical observations YYYYMMDD(UT) mag observer 20001007.512 135 (G. Hanson) 20001103.826 132 (T. Watanabe) 20001105.344 134 (M. Simonsen) 20001121.082 130 (G. Poyner) 20001127.085 130 (G. Poyner) 20001130.053 130 (G. Poyner) 20001202.985 130 (J. Ripero) 20001203.069 131 (G. Poyner) 20001204.405 135 (M. Simonsen) 20001223.657 132 (T. Watanabe) 20001227.972 130 (J. Ripero) 20001229.824 132 (H. Itoh) 20010103.698 131 (T. Watanabe) 20010104.606 131 (T. Watanabe) 20010105.644 131 (T. Watanabe) 20010107.058 129 (G. Poyner) 20010113.964 129 (G. Poyner) 20010116.026 130 (G. Poyner) 20010117.613 131 (T. Watanabe)